Display device and image display method of display device

Abstract

The embodiment of the invention belongs to the technology of LED all-in-one machine display equipment, and provides LED all-in-one machine display equipment and an image display method of the display equipment. Comprising a display screen, the display screen is formed by splicing a plurality of display modules, and a 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 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. According to the invention, signal complex transformation required by adopting a network protocol is reduced, and the convenience of a signal transmission process is improved.

Description

Technical Field

[0001] The embodiments of the present application relate to display device technology, and more specifically, to a display device and an image display method of the display device. Background Art

[0002] 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 meeting or training scenarios.

[0003] In the prior art, when transmitting signals between multiple display modules in a traditional LED display device, the signals are transmitted based on a network protocol, and the network protocol may be, for example, a Transmission Control Protocol (TCP), etc. The display module is used to generate a display image.

[0004] However, most display devices use the High-Definition Multimedia Interface (HDMI) interface, and the use of network protocols to transmit signals requires complex conversion between network protocols and HDMI protocols, making the signal transmission process cumbersome and complicated. Summary of the invention

[0005] The embodiments of the present application provide a display device and an image display method for the display device, which are used to solve the problem in the prior art that the use of network protocols to transmit signals requires complex conversion between network protocols and HDMI protocols, and the signal transmission process is cumbersome and complicated.

[0006] In a first aspect, an embodiment of the present application provides a display device, including:

[0007] A display screen, wherein the display screen is formed by splicing a plurality of display modules;

[0008] 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;

[0009] a processor connected to the high-definition multimedia interface HDMI and configured to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal;

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

[0011] In the present application, a second HDMI signal is obtained by a processor, and the second HDMI signal is sent from the first display module to the second display module, wherein the display modules are cascaded via unshielded twisted pair UTP network cables, thereby improving the convenience of the signal transmission process.

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

[0013] 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;

[0014] 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.

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

[0016] In some embodiments of the present 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 to:

[0017] 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.

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

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

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

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

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

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

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

[0025] In the present 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 the existing HDMI receiver and HDMI transmitter and saves pin resources.

[0026] In some embodiments of the present 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 the present application, the HDMI transmitter and the HDMI receiver are connected via the first capacitor and the second capacitor, thereby realizing the transmission of the HDMI signal between the HDMI transmitter and the HDMI receiver.

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

[0030] A first end of the first resistor is connected to the first power supply, and a second end of the first resistor is connected to a first end of the first switch;

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

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

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

[0034] 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;

[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 the present application, the HDMI transmitter circuit improves the stability of the HDMI transmitter circuit by adding a first power supply, a first resistor, and a second resistor.

[0037] In some embodiments of the present 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 end of the first capacitor is connected to the first end of the operational amplifier;

[0039] The second end of the second capacitor is connected to the second end 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 end of the fourth resistor is grounded;

[0042] A first end of the third capacitor is connected to the second power supply, and a second end of the third capacitor is connected to a first end 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 end of the sixth resistor is connected between the second end of the first capacitor and the first end of the operational amplifier. In the present application, the HDMI receiver circuit improves the stability of the HDMI receiver circuit by adding the third resistor, the fourth resistor and the third capacitor.

[0046] In some embodiments of the present application, 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;

[0047] 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;

[0048] 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.

[0049] In the present application, by sending the voltage difference to the operational amplifier, the operational amplifier generates a differential signal according to the voltage difference, thereby realizing the transmission of the second HDMI signal.

[0050] In some embodiments of the present 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, 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.

[0051] In the present application, a bias voltage is provided to the operational amplifier so that the operational amplifier can work normally, thereby improving the working stability of the operational amplifier, so that the HDMI receiver can receive the second HDMI signal.

[0052] In some embodiments of the present application, the high-definition multimedia interface HDMI is connected to the signal source via a high-definition multimedia interface HDMI connecting cable.

[0053] In the present application, the high-definition multimedia interface HDMI is connected to the signal source through a high-definition multimedia interface HDMI connecting cable, so that the high-definition multimedia interface HDMI obtains the audio and video signals emitted by the signal source.

[0054] In a second aspect, an embodiment of the present application provides an image display method of a display device, comprising:

[0055] 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;

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

[0057] The display screen generates a display image according to the second HDMI signal.

[0058] In the present application, the signal transmission efficiency is improved by converting the audio and video signals into HDMI signals for transmission. BRIEF DESCRIPTION OF THE DRAWINGS

[0059] In order to more clearly illustrate the implementation methods in the embodiments of the present application or the related technologies, the following is a brief introduction to the drawings required for use in the embodiments or the related technology descriptions. Obviously, the drawings described below are some embodiments of the present application, and a person skilled in the art can also obtain other drawings based on these drawings.

[0060] Figure 1 A schematic diagram of the physical structure of HDMI provided for 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 A schematic diagram of the structure of a display module provided in this application;

[0064] Figure 5 A schematic diagram of the physical structure of HDMI provided for this application;

[0065] Figure 6 A circuit diagram of another display module provided by the present application;

[0066] Figure 7 A schematic diagram of the structure of an HDMI transmitter circuit provided in an embodiment of the present application;

[0067] Figure 8 A schematic diagram of the structure of an HDMI receiver circuit provided in an embodiment of the present application;

[0068] Fig. 9 A schematic diagram of the structure of a circuit of another display module provided by the present application;

[0069] Fig.10 A schematic diagram of a flow chart of an image display method of a display device provided in the present application. DETAILED DESCRIPTION

[0070] In order to make the purpose, implementation mode and advantages of the present application clearer, the exemplary implementation mode of the present application will be clearly and completely described below in conjunction with the drawings in the exemplary embodiments of the present application. Obviously, the described exemplary embodiments are only part of the embodiments of the present application, rather than all the embodiments.

[0071] It should be noted that the brief description of terms in this application is only for the convenience of understanding the embodiments described below, and is not intended to limit the embodiments of this application. Unless otherwise specified, these terms should be understood according to their common and usual meanings.

[0072] In addition, the terms "include" and "have" and any variations thereof are intended to cover but not exclude inclusion, for example, a product or device comprising a list of components is not necessarily limited to those components expressly listed but may include other components not expressly listed or inherent to such products or devices.

[0073] The display device provided in the embodiments of the present application may have a variety of implementation forms. Taking an LED display device as an example, the display device may be a smart conference tablet, a touch-screen all-in-one machine, an electronic whiteboard, etc. It 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, and the like.

[0074] LED display screens 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.

[0075] In the prior art, a traditional LED display device includes multiple display modules. When a signal is transmitted among multiple display modules, it is usually transmitted from an HDMI transmitter of a current display module to an HDMI receiver of a next display module based on a network protocol. The display module is used to generate a display image according to the transmitted signal, wherein the network protocol may be, for example, a transmission control protocol (TCP). However, most display devices use a high-definition multimedia interface (HDMI) interface. Using a network protocol to transmit a signal requires complex conversion between the network protocol and the HDMI protocol, and the signal transmission process is cumbersome and complicated.

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

[0077] Table 1

[0078]

[0079]

[0080] 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).

[0081] 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. 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.

[0082] 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).

[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 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.

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

[0086] Pin 19 is a hot-plug 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-plug dedicated line (107).

[0087] In summary, we get Figure 1 The HDMI physical structure shown in Figure 1 A schematic diagram of the physical structure of HDMI provided in this application.

[0088] The circuits of the HDMI receiver 01 and the HDMI transmitter 02 in the display module are 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 embodiment, 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.

[0090] 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.

[0091] 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.

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

[0093] 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 a first end of the first switch and a 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 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.

[0095] The HDMI transmitter 02 is driven by a 10mA constant current source to generate a pair of differential signals. The HDMI receiver 01 needs to pull up the differential signals to 3.3V through the first resistor 24 and the second resistor 25 (pull-up resistor 50Ω). Since the HDMI receiver 01 is a high impedance input, almost all the driving current (10mA) passes through 3.3V to the pull-up resistor to the HDMI transmitter 02, that is, a voltage of 500mV (10mA*50Ω=500mV) is generated on the pull-up resistor. Figure 2 From the circuit, we can see that when one line switch is turned on, the voltage relative to the ground is 2.8V (3.3V-500Mv=2.8V), and the other line is in the disconnected state, that is, the voltage relative to the ground is 3.3V. When the driver state of the HDMI transmitter 02 is reversed, the direction of the current flowing through the matching resistor changes, so the high and low logic states of the HDMI receiver 01 change, that is, the differential swing of -500mV to +500mV is generated in the HDMI receiver 01, and the DC bias generated is 2.8V.

[0096] 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, but there is no ground wire in the UTP network cable. Therefore, this circuit cannot use an unshielded twisted pair (UTP) network cable.

[0097] Therefore, in view of the above technical problems in the prior art, the present application 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. Among them, 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 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 the present application mostly adopts the high-definition multimedia interface HDMI interface, and directly transmits the HDMI signal through the HDMI private protocol, which reduces the complex conversion of signals 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.

[0098] The technical solution of the present application is described in detail below 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.

[0099] Figure 3 A schematic diagram of the structure of a display device provided in this application, such as Figure 3 As shown, the display device 30 includes: a high-definition multimedia interface HDMI301, a processor 302, and a display screen 303, wherein the display screen 303 is formed by splicing a plurality of display modules 304.

[0100] The connection relationship may be: the high-definition multimedia interface HDMI301 is connected to the processor 302 , and the processor 302 is connected to the display screen 303 , wherein the display screen 303 is composed of a plurality of 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 , until it is connected to the last display module 304 .

[0102] The high-definition multimedia interface HDMI301 is used to obtain audio and video signals from a signal source and convert the audio and video signals into a first HDMI signal.

[0103] The signal source may 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.

[0104] In this embodiment, the signal source and the high-definition multimedia interface HDMI301 can be connected through a high-definition multimedia interface HDMI connecting 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.

[0105] The processor 302 is connected to the high-definition multimedia interface HDMI301, and 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 circuit ASIC, a field programmable gate array FPGA, or the like.

[0107] The 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.

[0108] If decomposed into one HDMI signal, then the one HDMI signal is transmitted between multiple display modules 304, and the signal received by each display module 304 is the same.

[0109] If it is decomposed into multiple HDMI signals, for example, two channels, the first HDMI signal can be transmitted between the multiple display modules 304 in the first channel, and the signal received by each display module 304 in the first channel is the same. The second HDMI signal can be transmitted between the multiple display modules 304 in the second channel, and the signal received by each display module 304 in the second channel is the same.

[0110] It should be understood that the above examples are only used for illustration and are not intended to limit the present application.

[0111] 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 .

[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] The display module 304 includes an HDMI receiver and an HDMI transmitter. When the second HDMI signal is transmitted between multiple display modules 304, a 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.

[0114] 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.

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

[0116] 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.

[0117] Using the HDMI protocol, taking the HDMI 2.1FRL protocol as an example, the total bandwidth can be as high as 48Gbps, which can achieve 8K@60Hz and 4K@120Hz transmission, which is conducive to the design of all-in-one machines. The bandwidth can be reduced by splitting the image (for example, to achieve 2K@60Hz, 16bit bit depth, the bandwidth is about 6.7Gbps).

[0118] In order to improve the cascade reliability between the display modules 304 in the display device 30, this embodiment simplifies the existing HDMI protocol to obtain an HDMI private protocol, and the simplified pins are changed from 19 in the above Table 1 to 8 in the following embodiment Table 2.

[0119] 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.

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

[0121] In the above embodiment of the present application, the display device 30 includes a display screen 303, wherein the display screen 303 is spliced ​​by a plurality of display modules 304, and also includes a high-definition multimedia interface HDMI301, which 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 a processor 302 connected to the high-definition multimedia interface HDMI301, and the 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 at least includes 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 through an unshielded twisted pair UTP network cable, and the above second HDMI signal is transmitted from the first display module 304 to the second display module 304 through the unshielded twisted pair UTP network cable. The display device 30 of this embodiment directly transmits HDMI signals through the HDMI private protocol, which reduces the complex conversion of signals between the network protocol and the HDMI protocol required for transmitting signals using the network protocol, and improves the convenience of the signal transmission process.

[0122] Furthermore, based on the above embodiments, the structural composition of the display module 304 is described in detail through the following embodiments. Figure 4 A schematic diagram of the structure of a display module provided in this application, such as Figure 4 As shown, it includes: an HDMI receiver 401 and an 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] 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 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 the HDMI transmitter 402 in the display module 304 include 8 pins, as shown in Table 2, and the 8 pins are respectively:

[0127] Table 2

[0128] HDMI Pin Numbering 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] Among them, pins 5 and 6 constitute a minimized transmission differential signal TMDS channel 0 (100), pins 3 and 4 constitute a minimized transmission differential signal TMDS channel 1 (101), pins 1 and 2 constitute a minimized transmission differential signal TMDS channel 2 (102), and pins 7 and 8 constitute a minimized transmission differential signal TMDS clock channel (103). Among them, the TMDS clock channel is configured to unify the timing required for transmitting the second HDMI signal when transmitting the second HDMI signal.

[0130] 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. 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.

[0131] It should be noted that the reason why the original 19 pins of HDMI are simplified to the current 8 pins is that the unshielded twisted pair UTP cable has only 8 wires, that is, 8 pins. Therefore, after simplification, the following is obtained: Figure 5 The HDMI physical structure shown in Figure 5 A schematic diagram of the physical structure of HDMI provided in this application.

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

[0133] exist Figure 6 In the embodiment, 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.

[0134] Figure 7 A schematic structural diagram of an HDMI transmitter circuit provided in an embodiment of the present application 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] 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 .

[0137] 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 .

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

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

[0140] A first end of the first capacitor 603 is connected between the second end of the first resistor 702 and a first end of the first switch 704 .

[0141] 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 .

[0142] Figure 8 A schematic diagram of the structure of an HDMI receiver circuit 602 provided in an embodiment of the present 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] A first end of the third resistor 802 is connected to the second power source 801 , and a second end of the third resistor 802 is connected to a first end of the fourth resistor 803 .

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

[0148] A first end of the third capacitor 806 is connected to the second power source 801 , and a second end of the third capacitor 806 is connected to a first end of the fifth resistor 804 .

[0149] 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 .

[0150] 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 .

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

[0152] 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 disconnected, the first power supply 701, the second resistor 703 (50Ω), and the second switch 705 generate a current break, 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 according to the first voltage 2.8V and the second voltage 3.3V, and generates a differential signal according to the voltage difference, and the differential signal is used to characterize the second HDMI signal.

[0153] Finally, we get Fig. 9 The circuit of the display module shown in FIG. Fig. 9 A schematic diagram of the structure of a circuit of another display module provided in the present application.

[0154] exist Fig. 9 In the embodiment, the first resistor 702 and the second resistor 703 are impedance matching resistors, and their resistance value can be 50Ω. The third resistor 802, the fourth resistor 804, the fifth resistor 804, and the sixth resistor 805 are bias resistors, which are used to provide bias voltage for the operational amplifier 807 in the HDMI receiver, so that the operational amplifier 807 can work normally to obtain a differential signal. The constant current source can be designed to be 10-16mA, which is used for adjusting the amplitude of the differential signal. The differential signal output by the HDMI transmitter only receives the differential signal because there is no ground connection between the HDMI receiver and the HDMI transmitter (i.e., the third channel M3 mentioned above), so a UTP network cable can be used for connection.

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

[0156] Furthermore, the application of the display device in this application is explained through the following embodiments. Fig.10 A schematic diagram of a flow chart of an image display method of a display device provided in the present application, such as Fig.10 As shown, the method comprises the following steps:

[0157] 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.

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

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

[0160] 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.

[0161] S103: The display screen generates a display image according to the second HDMI signal.

[0162] Among them, the display screen is composed of multiple display modules.

[0163] An image is generated according to the second HDMI signal obtained in step S112 to obtain a generated image.

[0164] For the specific implementation process, please refer to the aforementioned embodiment, which will not be repeated here.

[0165] In the above-mentioned embodiment of the present 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 according to the second HDMI signal, thereby improving the display efficiency of the image.

[0166] The present application also provides a computer-readable storage medium, which may include: a USB flash drive, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a disk or an optical disk, and other media that can store program codes. Specifically, the computer-readable storage medium stores program instructions, and the program instructions are used for the image display method of the display device in the above-mentioned embodiment.

[0167] The present application also provides a program product, which includes an execution instruction, which is stored in a readable storage medium. At least one control module of the display device can read the execution instruction from the readable storage medium, and at least one control module executes the execution instruction so that the display device implements the image display method of the display device provided by the above various embodiments.

[0168] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

[0169] For ease of explanation, the above description has been made in conjunction with specific embodiments. However, the above exemplary discussion is not intended to be exhaustive or limit the embodiments to the specific forms disclosed above. Based on the above teachings, various modifications and variations can be obtained. The selection and description of the above embodiments are intended to better explain the principles and practical applications, so that those skilled in the art can better use the embodiments and various different variations of the embodiments suitable for specific use considerations.

Claims

1. A display device, characterized in that: include: A display screen, wherein the display screen is formed by splicing a plurality of display modules; 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; a processor connected to the high-definition multimedia interface HDMI and configured to decompose the first HDMI signal into one or more HDMI signals to obtain a second HDMI signal; The display module at least includes a first display module and a second display module, the first display module and the second display module are connected via an unshielded twisted pair UTP network cable, and the second HDMI signal is transmitted from the first display module to the second display module via the unshielded twisted pair UTP network cable.

2. The display device according to claim 1, characterized in that The display module includes 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, 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 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, characterized in that The minimized transition 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 transition minimized differential signal TMDS channel 2 consists of the TMDS data 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 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, 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; A first end of the first resistor is connected to the first power supply, and a second end of the first resistor is connected to a first end of the first switch; A first end of the second resistor is connected to the first power source, and a second end of the second resistor is connected to a first end of the second switch; The second end of the first switch is grounded; A second terminal 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, 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 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, and 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; A first end of the third capacitor is connected to the second power supply, and a second end of the third capacitor is connected to a 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, characterized in that 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, 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, 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 any one of claims 1 to 10, characterized in that: The high definition multimedia interface HDMI is connected to the signal source via a high definition multimedia interface HDMI connecting cable.

12. A method for displaying an image of a display device, characterized in that: include: 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.

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