Display device and image display method of display device

Abstract

The invention provides a display device and an image display method of the display device. The display equipment comprises a display screen, a high-definition multimedia interface (HDMI) and at least one processor, wherein the display screen is formed by splicing a plurality of display modules, the display modules comprise 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 a second HDMI signal is transmitted from the first display module to the second display module through the unshielded twisted pair UTP network cable. The high-definition multimedia interface HDMI is used for obtaining audio and video signals sent by a signal source and converting the audio and video signals into first HDMI signals. And the at least one processor is used for decomposing the first HDMI signal to obtain a second HDMI signal, so that the display screen generates a display image according to the second HDMI signal, thereby reducing signal complex transformation required by adopting a network protocol, and improving the convenience of a signal transmission process.

Description

Display device and image display method thereof

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This disclosure claims priority to the Chinese application No. 202310999994.1, filed on August 9, 2023; and No. 202321866182.1, filed on July 14, 2023, the entire contents of which are incorporated by reference into this disclosure. Technical Field

[0003] The present disclosure relates to display device technology, and more specifically, to a display device and an image display method of the display device. Background Art

[0004] The display device is a multifunctional display screen. Due to its many advantages such as small space occupation and low energy consumption, it is widely used in conference or training scenarios.

[0005] In conventional LED display devices, multiple display modules transmit signals based on a network protocol, such as the Transmission Control Protocol (TCP), etc. The display modules are used to generate display images.

[0006] However, most display devices use the High-Definition Multimedia Interface (HDMI) interface, and using network protocols to transmit signals requires complex conversion between the network protocol and the HDMI protocol, making the signal transmission process cumbersome and complicated.

[0007] Summary of the Invention

[0008] In a first aspect, an embodiment of the present disclosure provides a display device, including:

[0009] A high-definition multimedia interface HDMI, the high-definition multimedia interface HDMI is used to obtain audio and video signals sent by a signal source and convert the audio and video signals into a first HDMI signal;

[0010] at least one processor connected to the high-definition multimedia interface (HDMI), configured to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal;

[0011] A display screen, configured to generate a display image based on the second HDMI signal, the display screen being composed of a plurality of display modules, the display modules including a first display module and a second display module, the first display module and the second display module being connected via an unshielded twisted pair (UTP) network cable, and the second HDMI signal being transmitted from the first display module to the second display module via the unshielded twisted pair (UTP) network cable.

[0012] In a second aspect, an embodiment of the present disclosure provides an image display method of a display device, comprising:

[0013] The high-definition multimedia interface HDMI obtains an audio and video signal sent by a signal source and converts the audio and video signal into a first HDMI signal;

[0014] The processor decomposes the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal;

[0015] The display screen generates a display image according to the second HDMI signal. The display screen is spliced ​​together by multiple display modules, and the display modules include 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. The second HDMI signal is transmitted from the first display module to the second display module through the unshielded twisted pair UTP network cable. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] FIG1 is a schematic diagram of an HDMI physical structure according to some embodiments;

[0017] FIG2 is a circuit diagram of a display module according to some embodiments;

[0018] FIG3 is a schematic structural diagram of a display device according to some embodiments;

[0019] FIG4 is a schematic structural diagram of a display module according to some embodiments;

[0020] FIG5 is a schematic diagram of an HDMI physical structure according to some embodiments;

[0021] FIG6 is a circuit diagram of another display module according to some embodiments;

[0022] FIG7 is a schematic structural diagram of an HDMI transmitter circuit according to some embodiments;

[0023] FIG8 is a schematic structural diagram of an HDMI receiver circuit according to some embodiments;

[0024] FIG9 is a schematic structural diagram of a circuit of another display module according to some embodiments;

[0025] FIG10 is a schematic flow chart of an image display method of a display device according to some embodiments;

[0026] FIG11 is a first schematic diagram of an exploded structure of a display module according to some embodiments;

[0027] FIG12 is a second schematic diagram of an exploded structure of a display module according to some embodiments;

[0028] FIG13 is a schematic diagram of a partial internal structure of a display module according to some embodiments;

[0029] FIG14 is a schematic structural diagram of a housing of a display module according to some embodiments;

[0030] FIG15 is a partial enlarged schematic diagram of point A in FIG14;

[0031] FIG16 is a partial structural diagram of a housing and a bracket of a display module according to some embodiments;

[0032] FIG17 is a partial enlarged schematic diagram of point B in FIG16;

[0033] FIG18 is a first schematic diagram of a partial structure of a bracket of a display module according to some embodiments;

[0034] FIG19 is a second schematic diagram of a partial structure of a bracket of a display module according to some embodiments;

[0035] FIG20 is a schematic structural diagram of a light board of a display module according to some embodiments. DETAILED DESCRIPTION

[0036] The display device provided in the embodiments of the present disclosure can have various implementation forms. Taking an LED display device as an example, the display device can be, for example, a smart conference tablet, a touch-sensitive all-in-one machine, an electronic whiteboard, etc., which displays text, images and video information with LED pixels and provides functions including but not limited to playback, information release, power management, human-computer interaction, wireless projection, etc.

[0037] LED displays are widely used in command centers, studios, and other fields due to their low energy consumption, high brightness, long life, and good performance stability. In recent years, with the rapid development of LED display technology, display devices have emerged.

[0038] Traditional LED display devices contain multiple display modules. Signals are typically transmitted between these modules via a network protocol, typically from the HDMI transmitter of one display module to the HDMI receiver of the next display module. The display modules then generate display images based on the transmitted signals. Network protocols, such as the Transmission Control Protocol (TCP), can be used. However, most display devices utilize the High-Definition Multimedia Interface (HDMI). Transmitting signals using this network protocol requires complex conversions between the network and HDMI protocols, making the signal transmission process cumbersome and complex.

[0039] Currently, the HDMI receiver 01 and HDMI transmitter 02 in the display module each contain 19 pins, as shown in Table 1. The 19 pins are:

[0040] Table 1

[0041] Among them, pins 7 to 9 constitute the minimized transmission differential signal TMDS channel 0 (100), pins 4 to 6 constitute the minimized transmission differential signal TMDS channel 1 (101), pins 1 to 3 constitute the minimized transmission differential signal TMDS channel 2 (102), and pins 10 to 12 constitute the minimized transmission differential signal TMDS clock channel (103).

[0042] The minimized transmission differential signal TMDS channel 0 (100), the minimized transmission differential signal TMDS channel 1 (101) and the minimized transmission differential signal TMDS channel 2 (102) are used to transmit the signal of the current display module to the next display module, and the transmission signal includes but is not limited to the audio signal L1, the video signal L2, the control signal and the status signal L3.

[0043] Pin 13 is a consumer electronics control pin, similar to an extended HDMI function, used to customize HDMI messages and generate a consumer electronics control line (104).

[0044] Pin 14 is a reserved pin used to detect whether the device is running, generating an optional reserved function line (105).

[0045] Pins 15 and 16 are mainly 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.

[0046] Pin 18 is used to connect the power supply.

[0047] Pin 19 is a hot-swap pin. When the interface is connected, the voltage level can be used to determine whether the device exists, and is used to generate a hot-swap dedicated line (107).

[0048] In summary, the HDMI physical structure shown in FIG1 is obtained. FIG1 is a schematic diagram of an HDMI physical structure provided by the present disclosure.

[0049] The circuits of the HDMI receiver 01 and the HDMI transmitter 02 in the display module are shown in FIG2 , which is a circuit diagram of a display module provided by the present disclosure.

[0050] In FIG. 2 , the HDMI transmitter 02 includes 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 .

[0051] The first end of the first switch 21 is connected to the first end of the operational amplifier 26 , and the second end of the first switch 21 is grounded.

[0052] A first terminal of the second switch 22 is connected to a second terminal of the operational amplifier 26 , and a second terminal of the second switch 22 is grounded.

[0053] A first end of the first resistor 24 is connected to the power supply 23 (AVcc), and a 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 .

[0054] A first end of the second resistor 25 is connected to the power source 23 , and a 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 .

[0055] 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 a first channel M1, the first end of the second switch 22 is connected to the second end of the operational amplifier 26 to form a second channel M2, and the third channel M3 is the ground connection between the HDMI transmitter 02 and the HDMI receiver 01.

[0056] HDMI transmitter 02 is driven by a 10mA constant current source to produce a pair of differential signals. HDMI receiver 01 needs to pull the differential signals up to 3.3V via first resistor 24 and second resistor 25 (50Ω pull-up resistors). Since HDMI receiver 01 has a high-impedance input, almost all of the drive current (10mA) flows through the 3.3V pull-up resistors to the HDMI transmitter 02, generating a voltage of 500mV (10mA*50Ω=500mV) across the pull-up resistors. As shown in the circuit of Figure 2, one line is switched on, with a voltage of 2.8V relative to ground (3.3V-500mV=2.8V), while the other line is disconnected, with a voltage of 3.3V relative to ground. When the driver state of the HDMI transmitter 02 reverses, the direction of the current flowing through the matching resistor changes, thereby generating a change in the high and low logic states of the HDMI receiver 01, that is, the differential swing generated in the HDMI receiver 01 is -500mV-+500mV, and the generated DC bias is 2.8V.

[0057] It should be noted that the above circuit 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 the UTP network cable. Therefore, this circuit cannot use an unshielded twisted pair (UTP) network cable.

[0058] To solve the above problems, the present disclosure proposes a display device and an image display method for the display device, wherein the display modules in 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 private protocol, and the display modules are cascaded through an unshielded twisted pair (UTP) network cable. The pins of the HDMI transmitter and HDMI receiver corresponding to the HDMI private protocol include: TMDS data 1+ pin, TMDS data 1- pin, TMDS data 2+ pin, TMDS data 2- pin, TMDS data 0+ pin, TMDS data 0- pin, TMDS clock+ pin and TMDS clock- pin. The display device disclosed in the present disclosure mostly adopts the High Definition Multimedia Interface (HDMI) interface, and directly transmits the HDMI signal through the HDMI private protocol, which reduces the complex signal conversion between the network protocol and the HDMI protocol required for transmitting the signal using the network protocol, and improves the convenience of the signal transmission process.

[0059] The following detailed description of the technical solution of the present disclosure is provided in conjunction with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described in detail in some embodiments.

[0060] FIG3 is a schematic structural diagram of a display device provided by the present disclosure. As shown in FIG3 , the display device 30 includes: a high-definition multimedia interface HDMI 301 , at least one processor 302 , and a display screen 303 , wherein the display screen 303 is formed by splicing multiple display modules 304 .

[0061] The connection relationship may be: the high-definition multimedia interface HDMI301 is connected to at least one processor 302, and at least one processor 302 is connected to a display screen 303, wherein the display screen 303 is composed of multiple display modules 304.

[0062] In some embodiments, at least one 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; wherein, the high-definition multimedia interface HDMI301 is used to obtain audio and video signals emitted by the signal source and convert the audio and video signals into a first HDMI signal.

[0063] The signal source can be a device that can send audio and video, such as a DVD player, a personal computer, etc. The high-definition multimedia interface HDMI301 is a fully digital video and sound transmission interface that can send audio and video signals.

[0064] In some embodiments, the signal source and the high-definition multimedia interface HDMI301 can be connected through a high-definition multimedia interface HDMI cable, so that the high-definition multimedia interface HDMI301 can obtain the audio and video signals of the signal source and convert the audio and video signals into a first HDMI signal.

[0065] At least one processor 302 connected to the high-definition multimedia interface HDMI301 is configured to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal.

[0066] In some embodiments, the at least one processor 302 may be an integrated circuit (ASIC), a field programmable gate array (FPGA), or the like.

[0067] The at least one processor 302 may decompose the first HDMI signal into one or more HDMI signals according to the screen resolution of the display device 30 to obtain a second HDMI signal.

[0068] If the signal is decomposed into one HDMI signal, the signal is transmitted between multiple display modules 304, and each display module 304 receives the same signal. If the signal is decomposed into multiple HDMI signals, for example, two channels, the first HDMI signal can be transmitted between multiple display modules 304 in the first channel, and each display module 304 in the first channel receives the same signal. The second HDMI signal can be transmitted between multiple display modules 304 in the second channel, and each display module 304 in the second channel receives the same signal.

[0069] The display module 304 at least includes a first display module 304 and a second display module 304 . When the second HDMI signal is transmitted between the plurality of display modules 304 , it is transmitted from the first display module 304 to the second display module 304 .

[0070] 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.

[0071] The 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 method is to send it from the HDMI transmitter of the first display module 304 to the HDMI receiver of the second display module 304 based on the HDMI private protocol.

[0072] Among them, the pins of the HDMI transmitter and HDMI receiver corresponding to the HDMI private 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.

[0073] In some embodiments, the number of display modules 304 is not limited and can be determined according to the type of display device 30 .

[0074] Based on the HDMI private protocol, the second HDMI signal is transmitted from the first display module 304, ie, the current display module, to the second display module 304, ie, the next display module, so that each display module 304 generates a display image according to the second HDMI signal.

[0075] Using the HDMI protocol, such as HDMI 2.1 FRL, the total bandwidth can reach up to 48Gbps, enabling the transmission of 8K@60Hz and 4K@120Hz, which is beneficial for all-in-one PC designs. Splitting images can reduce bandwidth (for example, achieving 2K@60Hz with a 16-bit bit depth requires approximately 6.7Gbps bandwidth).

[0076] In order to improve the cascade reliability between the display modules 304 in the display device 30, this embodiment simplifies the traditional HDMI protocol to obtain an HDMI private protocol. The simplified pins are changed from 19 in the above Table 1 to 8 in the following embodiment Table 2.

[0077] At the physical layer of the protocol, the display modules 304 are cascaded via unshielded twisted pair (UTP) network cables, further improving the reliability of the cascade.

[0078] In some embodiments, multiple display modules 304 are spliced ​​together to form a display screen 303 to display images.

[0079] In the above embodiment of the present disclosure, the display device 30 includes a display screen 303, wherein the display screen 303 is composed of multiple display modules 304, and also includes a high-definition multimedia interface HDMI301. The high-definition multimedia interface HDM1301 is used to obtain audio and video signals emitted by a signal source and convert the audio and video signals into a first HDMI signal. It also includes at least one processor 302 connected to the high-definition multimedia interface HDMI301, and the at least one processor 302 is used 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 304 and a second display module 304, and the first display module 304 and the second display module 304 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 via the HDMI private protocol, reducing the complex signal conversion between the network protocol and the HDMI protocol required for transmitting signals using the network protocol, thereby improving the convenience of the signal transmission process.

[0080] FIG4 is a schematic structural diagram of a display module provided by the present disclosure. As shown in FIG4 , the display module includes: an HDMI receiver 401 and an HDMI transmitter 402 .

[0081] The HDMI transmitter 402 of the first display module 304 is configured to transmit a second HDMI signal to the HDMI receiver 401 of the second display module 304 .

[0082] The HDMI receiver 401 of the second display module 304 is configured to receive the second HDMI signal sent by the HDMI transmitter 402 of the first display module 304 .

[0083] Among them, when the HDMI receiver 401 of the second display module 304 is used to receive the second HDMI signal sent by the first display module 304, it receives it through the minimized transition differential signal TMDS channel 0, the minimized transition differential signal TMDS channel 1 and the minimized transition differential signal TMDS channel 2 respectively.

[0084] In some embodiments, the HDMI receiver 401 and the HDMI transmitter 402 in the display module 304 include 8 pins, as shown in Table 2. The 8 pins are:

[0085] Table 2

[0086] Pins 5 and 6 form a minimized transmission differential signal TMDS channel 0 (100), pins 3 and 4 form a minimized transmission differential signal TMDS channel 1 (101), pins 1 and 2 form a minimized transmission differential signal TMDS channel 2 (102), and pins 7 and 8 form a minimized transmission differential signal TMDS clock channel (103). The TMDS clock channel is configured to unify the timing required for transmitting the second HDMI signal when transmitting the second HDMI signal.

[0087] The minimized transmission differential signal TMDS channel 0 (100), the minimized transmission differential signal TMDS channel 1 (101) and the 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, and the transmission signal includes but is not limited to the audio signal L1, the video signal L2, the control signal and the status signal L3.

[0088] It should be noted that the reason why the original 19 pins of HDMI are simplified to the current 8 pins is because the unshielded twisted pair UTP network cable has only 8 wires, i.e. 8 pins. Therefore, after simplification, the HDMI physical structure is obtained as shown in Figure 5, which is a schematic diagram of the HDMI physical structure provided by the present disclosure.

[0089] In some embodiments, the circuits of the HDMI receiver 401 and the HDMI transmitter 402 in the display module 304 are shown in FIG6 , which is a circuit diagram of another display module 304 provided by the present disclosure.

[0090] In FIG6 , the circuit of the display module includes an HDMI transmitter circuit 601 and an HDMI receiver circuit 602 , wherein the HDMI transmitter circuit 601 is connected to the HDMI receiver circuit 602 via a first capacitor 603 and a second capacitor 604 , respectively.

[0091] FIG7 is a schematic structural diagram of an HDMI transmitter circuit provided by an embodiment of the present disclosure, including: a first power supply 701 (Avcc-1), a first resistor 702, a second resistor 703, a first switch 704, and a second switch 705.

[0092] The connection relationship can be:

[0093] A first end of the first resistor 702 is connected to the first power source 701 , and a second end of the first resistor 702 is connected to a first end of the first switch 704 .

[0094] A first end of the second resistor 703 is connected to the first power source 701 , and a second end of the second resistor 703 is connected to a first end of the second switch 704 .

[0095] A second terminal of the first switch 704 is grounded.

[0096] A second terminal of the second switch 704 is grounded.

[0097] A first terminal of the first capacitor 603 is connected between the second terminal of the first resistor 702 and a first terminal of the first switch 704 .

[0098] A first end of the second capacitor 604 is connected between the second end of the second resistor 703 and a first end of the second switch 704 .

[0099] 8 is a schematic structural diagram of an HDMI receiver circuit 602 provided in an embodiment of the present disclosure, including: a second power supply 801 (Avcc-2), 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.

[0100] The connection relationship can be:

[0101] The second terminal of the first capacitor 603 is connected to the first terminal of the operational amplifier 807 .

[0102] The second terminal of the second capacitor 604 is connected to the second terminal of the operational amplifier 807 .

[0103] A first end of the third resistor 802 is connected to the second power supply 801 , and a second end of the third resistor 802 is connected to a first end of the fourth resistor 803 .

[0104] A second terminal of the fourth resistor 803 is grounded.

[0105] A first end of the third capacitor 806 is connected to the second power supply 801 , and a second end of the third capacitor 806 is connected to a first end of the fifth resistor 804 .

[0106] A 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 .

[0107] A 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 .

[0108] A 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 .

[0109] The principle is as follows: assuming that 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, and the voltage at the point between the second end of the first resistor 702 and the first end of the first switch 704 is the first voltage of 2.8V (3.3V-10mA*50Ω=2.8V). When the second switch 705 is opened, the first power supply 701, the second resistor 703 (50Ω), and the second switch 705 generate a current break circuit, and the voltage at the point between the second end of the second resistor 703 and the first end of the second switch 705 is the 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 the voltage difference. The differential signal is used to represent the second HDMI signal.

[0110] Finally, a circuit of a display module as shown in FIG9 is obtained. FIG9 is a structural diagram of a circuit of another display module provided by the present disclosure.

[0111] In Figure 9, first resistor 702 and second resistor 703 are impedance matching resistors, each with a resistance of 50Ω. Third resistor 802, fourth resistor 804, fifth resistor 805, and sixth resistor 806 are bias resistors used to provide bias voltage for operational amplifier 807 in the HDMI receiver, enabling it to operate normally and generate a differential signal. A constant current source, designed to be 10-16 mA, is used to adjust the amplitude of the differential signal. Because there is no ground connection between the HDMI receiver and the HDMI transmitter (i.e., the aforementioned third channel M3), only differential signals are received by the HDMI transmitter. Therefore, a UTP network cable can be used for connection.

[0112] In the above embodiments of the present disclosure, 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 more conveniently and quickly between display modules, thereby improving transmission efficiency.

[0113] Furthermore, the application of the display device in the present disclosure is described through the following embodiments. FIG10 is a flow chart of an image display method of a display device provided by the present disclosure. As shown in FIG10 , the method includes the following steps:

[0114] S101. A high-definition multimedia interface (HDMI) obtains an audio and video signal from a signal source and converts the audio and video signal into a first HDMI signal.

[0115] The signal source can be a device that can produce audio and video, such as a DVD player, a personal computer, etc.

[0116] S102: The processor decomposes the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal.

[0117] According to the screen resolution of the display device, the first HDMI signal is decomposed into one or more HDMI signals to obtain a second HDMI signal.

[0118] S103: The display screen generates a display image according to the second HDMI signal.

[0119] Among them, the display screen is composed of multiple display modules.

[0120] An image is generated according to the second HDMI signal obtained in step S112 to obtain a generated image.

[0121] In the above-mentioned embodiment of the present disclosure, 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, and obtains a second HDMI signal. The display screen generates a display image according to the second HDMI signal, thereby improving the display efficiency of the image.

[0122] As mentioned above, the display screen of the disclosed embodiment is composed of multiple display modules. Currently, common display modules mainly include a bracket, a housing, and several light panels. During installation, the light panels must be connected to the bracket, and then the bracket with the light panels mounted thereon must be connected to the housing to complete the assembly of the display module. However, since the light panels are directly connected to the bracket and connected to the housing through the bracket, in order to ensure the smooth assembly of the light panels, the bracket must have a high degree of flatness. This, in turn, requires high machining precision for the bracket and is relatively difficult to manufacture.

[0123] Each display module of the embodiment of the present disclosure (such as the aforementioned first display module and second display module) is composed of a housing, a bracket and a plurality of light panels. The light panels in the display module are arranged on the bracket and located on the same side of the bracket, the housing is arranged on the side of the bracket away from the light panels, a flatness adjustment structure is provided on the side of the bracket facing the bracket, and avoidance openings are provided at positions corresponding to the light panels on the bracket so that the flatness adjustment structure can pass through the avoidance openings to cooperate with the light panels. That is, the display module of the embodiment of the present disclosure, by setting the light panels on the bracket, the housing is located on the side of the bracket away from the light panels, and avoidance openings are provided at positions corresponding to the light panels on the bracket, and the flatness adjustment structure passes through the avoidance openings to cooperate with the light panels, that is, the light panels are directly connected to the housing without the need to use a bracket to connect to the housing, thereby eliminating the need for the bracket to have a high flatness, thereby solving the problem of high processing precision requirements and greater processing difficulty caused by the high requirements for the flatness of the bracket.

[0124] 11 to 20 , any one display module for constructing a display screen in the embodiments of the present disclosure is composed of a box 1 , a bracket 2 , and a plurality of light panels 3 .

[0125] Among them, the light boards 3 are all arranged on the same side of the bracket 2, and the bracket 2 is located on the side of each light board 3 away from the display surface 31 of the light board 3, the box 1 is located on the side of the bracket 2 away from the light board 3, and a flatness adjustment structure 13 is provided on the side of the box 1 facing the bracket 2.

[0126] In some embodiments, one side of the box body 1 has an opening 12 that is connected to the inner cavity 11 of the box body 1, and the side of the bracket 2 away from the light board 3 is set at the opening 12, and the position of the bracket 2 corresponding to each light board 3 is provided with an avoidance opening 27, so that at least part of the flatness adjustment structure 13 can pass through the avoidance opening 27 and be connected with the light board 3.

[0127] In some embodiments, as shown in FIG. 11 , the outer contour of the box body 1 may be rectangular, or, in other implementations, the outer contour of the box body 1 may also be diamond-shaped or other shapes.

[0128] In some embodiments, the shape of the flatness adjustment structure 13 can be adapted to the shape of the corresponding avoidance opening 27. For example, the avoidance openings 27 provided at the four corners of the outer edge of the bracket 2 can be in an irregular shape as shown in FIG19 . In this case, the shape of the flatness adjustment structure 13 adapted to the avoidance openings 27 is also set to an irregular shape adapted thereto. Specifically, reference can be made to the flatness adjustment structure 13 at the lower left corner of the box body 1 shown in FIG15 . For example, the shape of the avoidance opening 27 provided at a non-corner portion of the outer edge of the bracket 2 can be in an elongated shape as shown in FIG19 . In this case, the shape of the flatness adjustment structure 13 adapted thereto is also in an elongated shape. Specifically, reference can be made to the elongated flatness adjustment structure 13 on the lower edge of the box body 1 shown in FIG15 .

[0129] During implementation, as shown in Figure 11, multiple light boards 3 can be distributed in an array, and the display surfaces 31 of the multiple light boards 3 can be tightly attached to the external mounting platform through an external vacuum structure, so that the display surfaces 31 of the multiple light boards 3 maintain good flatness or planarity; then the bracket 2 is connected to the side of each light board 3 facing away from the display surface 31, thereby forming several light board arrays, and finally the side of the light board 3 of the formed light board array facing the box body 1 is matched and connected to the box body 1, so as to ensure the flatness of the display surface 31 of the light board 3.

[0130] In some embodiments, the bracket 2 and each light board 3 can be connected by bonding, or they can be connected by fasteners such as screws. Specifically, when the light board 3 is bonded to the bracket 2, bonding glue can be applied on the side of each light board 3 facing away from the display surface 31, and then the light board 3 is bonded to the bracket 2 by bonding glue. This operation is repeated to complete the bonding connection of multiple light boards 3 on the bracket 2. In addition, bonding glue can be applied at the positions corresponding to each light board 3 on the bracket 2 at one time, and then the light boards 3 are bonded to the bracket 2 in sequence. In the embodiment of the present disclosure, bonding glue can be applied to the light board 3 for bonding with the bracket 2, which makes it easier to bond a single light board 3 to the bracket 2.

[0131] Alternatively, when the light board 3 is connected to the bracket 2 by fasteners such as screws, fastening holes can be set on the bracket 2, and fastening holes can also be set on the light board 3. Screws and other fasteners are passed through the fastening holes of the light board 3 and the bracket 2 to achieve the connection between the light board 3 and the bracket 2.

[0132] During implementation, multiple light boards 3 can be connected to the bracket 2 in sequence, and when connecting multiple light boards 3 to the bracket 2, it is necessary to ensure that the display surfaces 31 of the multiple light boards 3 are located on the same plane, which ensures the flatness of the light boards 3.

[0133] At this time, the flatness of the display surface 31 of the lamp board 3 of the entire display module has nothing to do with the processing flatness of the bracket 2 itself, but is only related to the thickness of the lamp board 3 itself or the flatness of the lamp board 3 itself. Therefore, it can effectively solve the problem of high processing precision and greater processing difficulty caused by the need for the bracket 2 to have a higher flatness.

[0134] It should be noted that since the light panel 3 and the housing 1 do not need to be indirectly connected via the bracket 2, the bracket 2 does not need to be thick. In practice, the bracket 2 in the related art needs to be rigid due to the need for connection. Therefore, the thickness of the bracket 2 in the related art ranges from 2mm to 3mm. However, the thickness of the bracket 2 can be set to be smaller to meet semi-rigidity.

[0135] In some embodiments, the thickness of the bracket 2 may only be set to 1.2 mm-1.5 mm to meet the stiffness requirements.

[0136] In some embodiments, the thickness of the bracket 2 may be 1.2 mm, or the thickness of the bracket 2 may be 1.3 mm, or the thickness of the bracket 2 may be 1.5 mm. The specific thickness of the bracket 2 may be set according to actual needs, and this embodiment does not make any specific limitation on this.

[0137] In addition, when selecting the material of the bracket 2, a semi-rigid material can also be selected to meet the rigidity requirement. Therefore, even if the display module is slightly bent, it will not affect the flatness of the light board 3 when it is matched with the box 1.

[0138] Furthermore, if the flatness of the display surfaces 31 of multiple light boards 3 needs to be adjusted, the corresponding light boards 3 can also be adjusted when a single light board 3 is connected to the bracket 2, which can also facilitate the flatness adjustment of the display surface 31 of the display module.

[0139] In some embodiments, as shown in FIG11 , eight light boards 3 may be provided, and the eight light boards 3 may be arranged in two rows and four columns. Alternatively, in other implementations, four, six, or more than eight light boards 3 may be provided. The specific number of light boards 3 may be set according to actual needs and is not specifically limited in this embodiment.

[0140] In some embodiments, the light board 3 may specifically be a light emitting diode (LED) light board, so that different images can be displayed by controlling the LEDs.

[0141] In some embodiments, the size of the light panels 3 can be selected based on actual conditions. When the light panels 3 are larger, the display module can include fewer light panels 3, thereby facilitating connection of the light panels 3 to the bracket 2. When the light panels 3 are smaller, the display module can include more light panels 3, thereby enabling more precise adjustment of the displayed image by controlling more light panels 3.

[0142] In some embodiments, as shown in FIG11 , each light panel 3 can be rectangular in shape, or in other implementations, the light panel 3 can also be in a rhombus, triangle, or other shape. The specific shape of the light panel 3 depends on the appearance requirements of the specific display module, and this embodiment does not specifically limit this. In addition, the shape and size specifications of all light panels 3 can be consistent, thereby facilitating the production and molding of the light panels 3. Alternatively, in other implementations, the light panels 3 can also be provided with different shapes or sizes.

[0143] In addition, the bracket 2 is located on the side of the light board 3 away from the display surface 31 of the light board 3, that is, the bracket 2 is located on the side where the back of the light board 3 is located, so that when the audience watches the picture displayed on the display surface 31, the bracket 2 will not block the picture, thereby ensuring the audience's normal viewing.

[0144] In order to achieve direct connection and cooperation between the light board 3 and the box body 1 during implementation, an avoidance opening 27 can be provided on the bracket 2 so that at least part of the flatness adjustment structure 13 can pass through the avoidance opening 27 and be connected and cooperated with the light board 3.

[0145] It should be noted that the connection here can be solely electrical, for example, at least a portion of the flatness adjustment structure 13 can pass through the avoidance opening 27 and directly contact the light board 3 to achieve contact and conduction. Alternatively, the connection here can include both electrical and mechanical connection, for example, at least a portion of the flatness adjustment structure 13 can pass through the avoidance opening 27 and be bonded to the light board 3 using conductive adhesive, thereby achieving both electrical and adhesive connection between the light board 3 and the housing 1.

[0146] In summary, the display module provided in this embodiment is configured such that the light board 3 is arranged on the bracket 2, the box body 1 is located on the side of the bracket 2 away from the light board 3, and a clearance opening 27 is provided on the bracket 2 at a position corresponding to the light board 3, so that at least part of the flatness adjustment structure 13 can pass through the clearance opening 27 and be connected with the light board 3, that is, the light board 3 is directly connected with the box body 1 without the need to use the bracket 2 to connect with the box body 1, thereby eliminating the need for the bracket 2 to have a higher flatness, thereby effectively solving the problem of high processing precision requirements and greater processing difficulty caused by the high requirements on the flatness of the bracket 2.

[0147] In some embodiments, the flatness adjustment structure 13 can be integrally formed with the box body 1 to save manufacturing steps and improve the structural strength of the box body 1. Alternatively, the flatness adjustment structure 13 can be formed separately from the box body 1 and then bonded or welded together.

[0148] In some embodiments, the specific connection sequence or installation process for the light board 3, box body 1 and bracket 2 can be: each light board 3 is bonded to the bracket 2 and together with the bracket 2 forms a light board bracket assembly; the light board 3 of the light board bracket assembly is cooperatively connected with the flatness adjustment structure 13.

[0149] That is, during installation, the multiple light panels 3 are first bonded to the bracket 2 in sequence, so that the bracket 2 connected with the light panels 3 forms a complete light panel bracket assembly. The light panel bracket assembly is then connected to the housing 1 as a whole to improve assembly efficiency. Specifically, the light panel bracket assembly is directly connected to the flatness adjustment structure 13 of the housing 1 through the light panels 3.

[0150] Specifically, as shown in Figures 15 and 17 , the flatness adjustment structure 13 may include a conductive protrusion 131 protruding toward the bracket 2 . The conductive protrusion 131 is in contact and conductive with the light board 3 , thereby achieving a connection between the box 1 and the light board 3 . For specific connection details, please refer to the relevant explanations above.

[0151] In some embodiments, the conductive protrusions 131 may be metal conductive protrusions or non-metal conductive protrusions. When the conductive protrusions 131 are metal conductive protrusions, the metal conductive protrusions may be aluminum conductive protrusions or copper conductive protrusions. When the conductive protrusions 131 are non-metal conductive protrusions, the non-conductive conductive protrusions may be graphene conductive protrusions.

[0152] During implementation, referring to Figures 11, 12, 14 and 15, in some embodiments, there are at least two flatness adjustment structures 13, at least two flatness adjustment structures 13 are arranged at intervals along the circumference of the box body 1, there are at least two avoidance openings 27, and the avoidance openings 27 correspond one-to-one to the flatness adjustment structures 13, so that multiple flatness adjustment structures 13 can be connected and matched with the corresponding lamp boards 3 to improve the matching stability of the lamp board 3 and the box body 1.

[0153] In some embodiments, there can be one avoidance opening 27 and flatness adjustment structure 13 corresponding to the same light board 3, or there can be multiple avoidance openings 27 and flatness adjustment structures 13 corresponding to the same light board 3. Multiple avoidance openings 27 are arranged at circumferential intervals along the corresponding light board 3, so that the same light board 3 can be connected and matched through multiple flatness adjustment structures 13 to further improve the matching stability between the light board 3 and the box body 1.

[0154] In some embodiments, the flatness adjustment structure 13 can be integrally formed with the box body 1, thereby saving manufacturing steps and improving the structural strength of the box body 1. Alternatively, the flatness adjustment structure 13 can be formed separately from the box body 1 and then welded together.

[0155] In some embodiments, the avoidance opening 27 may be rectangular or irregular in shape.

[0156] In some embodiments, the side of the flatness adjustment structure 13 facing the light board 3 can be set flush with the edge of the avoidance opening 27 facing the light board 3, thereby avoiding the problem that the flatness adjustment structure 13 protrudes from the bracket 2, resulting in an increase in the overall thickness of the display module or causing a gap when the box 1 and the light board 3 are matched, resulting in poor sealing.

[0157] Referring to Figures 15 to 19, in some embodiments, the outer contour shape of the flatness adjustment structure 13 is adapted to the contour shape of the avoidance opening 27, so that the flatness adjustment structure 13 can just pass through the avoidance opening 27 and be matched with the light board 3 for connection, and the problem of a gap between the flatness adjustment structure 13 and the avoidance opening 27 causing dust to easily accumulate in the gap and making it inconvenient to clean can be avoided.

[0158] 14 and 16 , in some embodiments, the box body 1 includes a box frame 14 and a partition 15 . The partition 15 is arranged in the box frame 14 to divide the inner cavity 11 of the box frame 14 into a plurality of installation cavities 16 , and the plurality of installation cavities 16 correspond one-to-one to a plurality of light panels 3 . A flatness adjustment structure 13 is provided on the box frame 14 and / or the partition 15 .

[0159] During implementation, the number of mounting cavities 16 is consistent with the number of light boards 3. In some embodiments, when eight light boards 3 are provided, the divider 15 can divide the inner cavity 11 of the box frame 14 into eight mounting cavities 16. The specific number of mounting cavities 16 can be determined based on the number of light boards 3 provided, and this embodiment does not impose a specific limitation on this.

[0160] When eight mounting cavities 16 are provided, the eight mounting cavities 16 can be arranged in two rows and four columns as shown in FIG14 . The divider 15 can include a transverse first divider 151 and four longitudinal second dividers 152 . The transverse first divider 151 and the longitudinal second dividers 152 are arranged crosswise to divide the inner cavity 11 of the box frame 14 into eight mounting cavities 16 . The specific number of longitudinal second dividers 152 and transverse first dividers 151 provided can be determined based on the number of mounting cavities 16 to be formed.

[0161] In some embodiments, the transverse first partition plate 151 and the longitudinal second partition plate 152 can be integrally formed to save manufacturing steps and improve the structural strength of the partition 15. Alternatively, in other implementations, the first partition plate and the second partition plate can be formed separately and then bonded together.

[0162] Furthermore, when the partition 15 is disposed in the inner cavity 11 of the box frame 14, it can be connected to the inner wall of the box frame 14, so that the partition 15 can be reliably installed in the box frame 14. Alternatively, the partition 15 can also be integrally formed with the box body 14 to save manufacturing steps and improve the structural strength of the box body 14.

[0163] Specifically, the flatness adjustment structure 13 between the separator 15 and the box frame 14 may be: adhesive is provided at the position where the separator 15 contacts the box frame 14, thereby enabling adhesive connection between the separator 15 and the box frame 14. Alternatively, a slot may be provided on the inner wall of the box frame 14 at the position where the separator 15 contacts the box frame 14, and the separator 15 may be inserted into the slot to achieve a snap connection between the separator 15 and the box frame 14.

[0164] During implementation, the flatness adjustment structure 13 can be set only on the box frame 14, or only on the partition 15, or on both the partition 15 and the box frame 14. The specific setting position and number of the flatness adjustment structure 13 are determined according to the setting position and number of the avoidance opening 27.

[0165] 11 and 12 , in some embodiments, the bracket 2 includes a plurality of frames 28 , two adjacent frames 28 are connected, and the plurality of frames 28 are arranged in one-to-one correspondence with the plurality of light panels 3 ; each frame 28 is provided with an avoidance opening 27 .

[0166] During implementation, the number of frames 27 provided is consistent with the number of light boards 3 provided. In some embodiments, when eight light boards 3 are provided, the number of frames 28 is also eight, with one frame 28 connected to one light board 3. Each frame 28 is provided with a clearance opening 27, so that the housing 1 can pass through the clearance opening 27 and connect with each light board 3.

[0167] In some embodiments, a clearance opening 27 may be provided on each frame 28; or multiple clearance openings 27 may be provided on each frame 28, and the multiple clearance openings 27 are provided at intervals along the circumference of the corresponding frame 28, so that there are multiple mating connection points between the light panel 3 and the box body 1, so as to further enhance the mating stability between the light panel 3 and the box body 1. For example, when eight frames 28 are provided, a clearance opening 27 may be provided on the outer edge of each frame 28, or a clearance opening 27 may also be provided at the contact point between two adjacent frames 28. Specifically, each frame 28 may be made of alloy or metal and then spliced ​​together to form the bracket 2. Alternatively, the bracket 2 may be cut from a whole piece of metal or alloy and then formed into multiple frames 28 that are spliced ​​together.

[0168] In some embodiments, the cross section of the frame 28 may be rectangular, circular, or any other shape.

[0169] 11 and 12 , in some embodiments, a first connection portion is provided on the box body 1 , and a second connection portion is provided on the light board 3 at a position corresponding to the first connection portion. The first connection portion can pass through the frame 28 and be connected to the second connection portion, thereby reliably connecting the light board 3 to the box body 1 .

[0170] In some embodiments, the first connecting portion is a first magnetic member 17, and the second connecting portion is a second magnetic member 32. The first magnetic member 17 and the second magnetic member 32 are magnetically connected, thereby reliably adsorbing and connecting the light board 3 to the box 1. Alternatively, in other implementations, the first connecting portion can be a connecting hole, and the second connecting portion can be a connecting post. The mechanical connection between the light board 3 and the box 1 is achieved by the cooperation of the connecting post and the connecting hole.

[0171] Alternatively, in other implementations, the first connecting portion may be a threaded column with an inner hole, and the second connecting portion may be a connecting hole, and the fastener passes through the connecting hole and the inner hole in sequence to achieve a reliable connection between the box body 1 and the light panel 3. In some embodiments, the inner hole and the connecting hole may both be threaded holes, and the fastener may be a bolt or screw that cooperates with the threaded hole. Alternatively, the inner hole and the connecting hole may both be light holes, and the fastener may be a fastening pin that cooperates with the light hole. In addition, when a threaded column with an inner hole is provided on the box body 1, the threaded column may be integrally formed with the box body 1 to save manufacturing steps and improve the structural strength of the box body 1. Alternatively, the threaded column may be snapped onto the box body 1 or welded to the box body 1.

[0172] In some embodiments, there can be multiple second connection parts, and the multiple second connection parts are arranged at circumferential intervals along the corresponding lamp board 3. There can also be multiple first connection parts, and the multiple first connection parts correspond one-to-one to the multiple second connection parts, so that the connection stability between the lamp board 3 and the box body 1 can be further improved through the connection of the multiple first connection parts and the multiple second connection parts.

[0173] During implementation, the second connection portion can be positioned on the side of the light board 3 facing away from the display surface 31 to facilitate the connection and mating between the first connection portion and the second connection portion. Furthermore, the side of the first connection portion facing the light board 3 can be aligned with the side of the bracket 2 facing the light board 3, thereby avoiding the problem of a poor connection and sealing between the case 1 and the light board 3 resulting from a mounting gap between the case 1 and the light board 3 caused by the first connection portion protruding from the bracket 2.

[0174] In addition, in addition to setting the connection between the light board 3 and the box body 1 through the cooperation of the first connecting part and the second connecting part, in order to ensure the assembly stability and reliability of the bracket 2, the bracket 2 can also be set to be connected to the other surfaces of the box body 1 except the front side facing the light board 3, so that the front side of the box body 1 is cooperated and connected with the light board 3 while the front side of the box body 1 is not connected to the bracket 2, so as to avoid the problem of high requirements for the flatness of the bracket 2, and the other surfaces of the box body 1 except the front side can be connected to the bracket 2 to improve the installation reliability of the bracket 2.

[0175] In some embodiments, the bracket 2 may be connected to the top surface of the box body 1, or may be connected to the bottom surface of the box body 1. Specifically, the bracket 2 may be connected to the box body 1 via fasteners such as bolts or fastening pins. When the bracket 2 is connected to the box body 1 via fasteners such as bolts or fastening pins, a connecting bracket may be provided between the bracket 2 and the box body 1, the connecting bracket being welded to one of the box body 1 and the bracket 2, and the connecting bracket being connected to the other of the box body 1 and the bracket 2 via fasteners such as bolts or fastening pins.

[0176] In some embodiments, two adjacent display modules are spliced ​​and connected to form a complete large display screen. In practice, multiple display modules can be arranged in an array to form a large display screen with a relatively regular appearance. The specific number of display modules can be determined based on the required display screen size.

Claims

1. A display device, comprising: A high-definition multimedia interface HDMI, wherein the high-definition multimedia interface HDMI is used to obtain audio and video signals sent by a signal source and convert the audio and video signals into a first HDMI signal; At least one processor, the at least one processor is connected to the high-definition multimedia interface HDMI, and is used to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal; A display screen, used for generating a display image according to the second HDMI signal, the display screen is spliced ​​by multiple display modules, the display modules include 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.

2. The display device according to claim 1, wherein the display module comprises an HDMI receiver and an HDMI transmitter; The second HDMI signal is sent from the HDMI transmitter of the first display module to the HDMI receiver of the second display module based on the HDMI private protocol; The pins of the HDMI transmitter and the HDMI receiver corresponding to the HDMI private protocol include: TMDS data 1+ pin, TMDS data 1- pin, TMDS data 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, wherein the HDMI receiver of the second display module, when used to receive the second HDMI signal sent by the first display module, is specifically used to: The HDMI receiver of the second display module receives the second HDMI signal sent by the first display module through the minimized transition differential signal TMDS channel 0, the minimized transition differential signal TMDS channel 1 and the minimized transition differential signal TMDS channel 2 respectively.

4. The display device according to claim 3, wherein the transition minimized differential signal TMDS channel 0 is composed of the TMDS data 0+ pin and the TMDS data 0- pin; The minimized transition differential signal TMDS channel 1 is composed of the TMDS data 1+ pin and the TMDS data 1- pin; the minimized transition differential signal TMDS channel 2 is composed of the TMDS data 2+ pin and the TMDS data 2- pin.

5. According to the display device of claim 4, the TMDS clock + pin and the TMDS clock - pin constitute a TMDS clock channel; the TMDS clock channel is configured to unify the timing required for transmitting the second HDMI signal when transmitting the second HDMI signal.

6. The display device according to claim 5, wherein the circuit of the display module comprises 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, wherein the HDMI transmitter circuit comprises 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 supply, the second end of the first resistor is connected to the first end of the first switch; the second end of the first switch is grounded; The first end of the second resistor is connected to the first power supply, the second end of the second resistor is connected to the first end of the second switch; the second end of the second switch is grounded; the first end of the first capacitor is connected between the second end of the first resistor and the first end 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, wherein the HDMI receiver circuit comprises 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 end of the first capacitor is connected to the first end of the operational amplifier; The second end of the second capacitor is connected to the second end of the operational amplifier; The first end of the third resistor is connected to the second power supply, the second end of the third resistor is connected to the first end of the fourth resistor; the second end of the fourth resistor is grounded; The first end of the third capacitor is connected to the second power supply, the second end of the third capacitor is connected to the first end 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, when the first switch is closed, the first power source, the first resistor, and the first switch form a current path, and a voltage at a point between the second end of the first resistor and the first end of the first switch is a first voltage; When the second switch is disconnected, the first power source, the second resistor, and the second switch form a current break circuit, and a voltage at a point between the second end of the second resistor and the first end of the second switch is a second voltage; The operational amplifier is used to obtain a voltage difference according to the first voltage and the second voltage, and to generate a differential signal according to the voltage difference, wherein the differential signal is used to represent the second HDMI signal.

10. The display device according to claim 9, wherein the third resistor, the fourth resistor, the fifth resistor, and the sixth resistor are used to provide a bias voltage for the operational amplifier, and the bias voltage is used to enable the operational amplifier to work normally so that the operational amplifier obtains the voltage difference according to the first voltage and the second voltage. 11 . The display device according to claim 1 , wherein the high-definition multimedia interface HDMI is connected to the signal source via a high-definition multimedia interface HDMI connecting cable.

12. According to the display device described in claims 1-11, each display module is composed of a box body, a bracket and a plurality of light panels; The plurality of light boards are arranged on the same side of the bracket, and the bracket is located on a side of each of the plurality of light boards away from the display surfaces of the plurality of light boards; The box body is located on a side of the bracket away from the multiple light boards, a flatness adjustment structure is provided on the side of the box body facing the bracket, and avoidance openings are provided at positions on the bracket corresponding to the multiple light boards, so that at least part of the flatness adjustment structure can pass through the avoidance opening and cooperate with the multiple light boards.

13. The display device according to claim 12, wherein the plurality of light boards are bonded to the bracket and form a light board bracket assembly with the bracket; and the plurality of light board bracket assemblies are cooperatively connected with the flatness adjustment structure.

14. The display device according to claim 12, wherein the flatness adjustment structure comprises a conductive protrusion protruding in a direction close to the bracket, wherein the conductive protrusion passes through the avoidance opening to contact and conduct with the multiple light panels; and / or, there are at least two flatness adjustment structures, and at least two of the flatness adjustment structures are arranged at intervals along the circumference of the box body, and there are at least two avoidance openings, and the avoidance openings correspond to the flatness adjustment structures one by one; and / or, the flatness adjustment structure is integrally formed with the box body.

15. According to the display device according to claim 13, the outer contour shape of the flatness adjustment structure is adapted to the contour shape of the avoidance opening; and / or, a side of the flatness adjustment structure facing the multiple light boards is flush with an edge of a side of the avoidance opening facing the multiple light boards.

16. The display device according to claim 13, wherein the box body comprises a box frame and a partition, wherein the partition is arranged in the box frame to divide the inner cavity of the box frame into a plurality of installation cavities, and the plurality of installation cavities correspond to the plurality of light panels one by one; The flatness adjustment structure is arranged on the box frame and / or the partition.

17. The display device according to claim 12, wherein the bracket comprises a plurality of frames, two adjacent frames are connected, and the plurality of frames are arranged in one-to-one correspondence with the plurality of light panels; and the avoidance is provided on each of the frames.

18. The display device according to claim 17, wherein a first connection portion is disposed on the box body, and second connection portions are disposed on the plurality of light panels at positions corresponding to the first connection portion, and the first connection portion can pass through the frame and be connected to the second connection portion.

19. According to the display device of claim 18, the first connecting part is a first magnetic part, the second connecting part is a second magnetic part, and the first magnetic part is magnetically connected to the second magnetic part; and / or the second connecting part is located on a side of the multiple light panels away from the display surface.

20. The display device according to claim 18, wherein the first connecting portion is arranged on a side facing the plurality of light boards and flush with a side of the bracket facing the plurality of light boards; and / or the thickness of the bracket is in the range of 1.2 mm to 1.5 mm.

21. A method for displaying an image of a display device, comprising: The high-definition multimedia interface HDMI obtains the audio and video signals sent 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 a second HDMI signal; The display screen generates a display image according to the second HDMI signal. The display screen is spliced ​​by multiple display modules. The display modules include 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. The second HDMI signal is transmitted from the first display module to the second display module through the unshielded twisted pair UTP network cable.

Images