LED display screen control method and LED display screen

Abstract

The invention is suitable for the technical field of LED display screens, and provides an LED display screen control method and an LED display screen, the method is applied to a first box body of the LED display screen, and the method comprises the steps that an interface chip obtains a to-be-processed signal, and the to-be-processed signal comprises image information; an image interception module intercepts image information corresponding to the position information of the first box body from the image information to obtain intercepted image information, and the position information of the first box body reflects the position of the first box body on the LED display screen; the display module displays the intercepted image information; and the MCU is used for controlling the interface chip, the image capturing module and the display module. Through the method, the maintenance difficulty of the LED display screen can be reduced.

Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of LED display screens, and particularly relates to an LED display screen control method, an LED display screen, a computer readable storage medium and a computer program product. BACKGROUND

[0002] An LED (Light-Emitting Diode) display screen is a flat panel display device using light-emitting diodes as pixel light-emitting elements. At present, the typical architecture of an LED display screen synchronous control system is: computer (or splicer) -> sending card -> receiving card -> cabinet (the cabinet usually includes cabinet structural members, a HUB board and a lamp panel). Figure 1 An existing LED display screen synchronous control system is shown in a schematic diagram. In Figure 1 , the computer (or splicer) and the sending card transmit video data through an HDMI line, transmit configuration data through a USB or RJ45, and the sending card and the receiving card transmit data using a gigabit network protocol.

[0003] Under the architecture of Figure 1 , there are the following deficiencies:

[0004] 1. There are a total of 4 nodes from the computer end (or splicer end) to the screen body, which are the nodes corresponding to the computer, the sending card, the receiving card and the cabinet. When there are too many nodes, if the screen body fails, it will increase the troubleshooting workload and difficulty, require high technical support personnel for after-sales, and increase the maintenance cost.

[0005] 2. Although the sending card, the receiving card and the cabinet are seemingly independent individuals, they cannot work independently: the cabinet needs to rely on the sending card and the receiving card to work cooperatively, and at the same time, the sending card and the receiving card also rely on each other and cannot work independently. Since each node needs to rely on each other to work, the coupling between each node is serious, which is not conducive to maintenance, and since the manufacturers of different nodes may be different, when the standards of the manufacturers of the sending card or the receiving card change, the cabinet also needs to be adjusted accordingly, which is not conducive to the development of the LED display screen in the direction of standardization.

[0006] 3. Video transmission is generally implemented using a gigabit network, so the maximum load of each network port is 650,000 points, and if a complete 4K is transmitted, 16 network lines (such as P1-P16 in Figure 1 ) are needed. The larger the screen body is, the more network lines are used, and the more bloated it is, so not only the cost of wire materials is increased, but also the maintenance difficulty is increased.

[0007] Therefore, it is necessary to provide a new LED display screen to reduce the maintenance difficulty of the LED display screen. SUMMARY

[0008] Embodiments of the present application provide an LED display screen control method and an LED display screen, which can solve the problem of high maintenance difficulty caused by too many control levels (or nodes) of the LED display screen.

[0009] In a first aspect, embodiments of the present application provide an LED display screen control method applied to a first box body of an LED display screen, the first box body comprising an interface chip, a microcontroller unit (MCU), an image intercepting module and a display module, and the LED display screen control method comprising:

[0010] The interface chip acquires a to-be-processed signal, and the to-be-processed signal comprises image information;

[0011] The image intercepting module intercepts image information corresponding to position information of the first box body in the image information, to obtain intercepted image information, and the position information of the first box body reflects a position of the first box body in the LED display screen;

[0012] The display module displays the intercepted image information;

[0013] The MCU controls the interface chip, the image intercepting module and the display module.

[0014] In embodiments of the present application, the first box body of the LED display screen comprises the interface chip, the MCU, the image intercepting module and the display module. The LED display screen acquires the to-be-processed signal comprising the image information through the interface chip, intercepts the image information corresponding to the position information of the first box body in the image information through the image intercepting module, and displays the obtained intercepted image information through the display module. Since the first box body acquires the to-be-processed signal through the interface chip when acquiring the to-be-processed signal, it is not necessary to acquire the to-be-processed signal through the sending card and the receiving card, thus greatly reducing the node level involved in the architecture of the LED display screen synchronous control system, and reducing the network cable connected between the LED display screen and the external device (such as no longer needing the sending card and the network cable connected between the sending card and the box body), so as to reduce the maintenance difficulty of the LED display screen when the LED display screen fails. Moreover, since the LED display screen no longer depends on the sending card and the receiving card, the development of the LED display screen is not limited by the sending card and the receiving card, thus being conducive to the development of the LED display screen in the direction of standardization.

[0015] In a second aspect, embodiments of the present application provide an LED display screen comprising a plurality of first box bodies, each of the first box bodies comprising an interface chip, an MCU, an image intercepting module and a display module;

[0016] The LED display screen is controlled by the LED display screen control method of the first aspect.

[0017] In a third aspect, the embodiments of the present application provide a computer readable storage medium, which stores a computer program. The computer program is executed by a processor to implement the method of the first aspect.

[0018] In a fourth aspect, the embodiments of the present application provide a computer program product. When the computer program product is run on an electronic device, the electronic device executes the method of the first aspect.

[0019] It can be understood that the beneficial effects of the second aspect to the fourth aspect can be referred to the related description in the first aspect, which will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or prior art description will be briefly introduced.

[0021] Figure 1 is a schematic diagram of an existing LED display screen synchronization control system;

[0022] Figure 2 is a structural schematic diagram of a first box of an LED display screen provided by an embodiment of the present application;

[0023] Figure 3 is a structural schematic diagram of an image interception module provided by an embodiment of the present application, which includes a first image cutting unit and a second image cutting unit;

[0024] Figure 4 is a structural schematic diagram of an image interception module provided by an embodiment of the present application, which includes a field programmable gate array;

[0025] Figure 5 is a coordinate schematic diagram of a box of an LED display screen provided by an embodiment of the present application;

[0026] Figure 6 is a structural schematic diagram of an LED display screen provided by an embodiment of the present application Figure 5 corresponding image position coordinate diagram;

[0027] Figure 7 is a structural schematic diagram of a box provided by an embodiment of the present application, in which four serial ports are instantiated in an MCU of the box;

[0028] Figure 8 is a structural schematic diagram of an LED display screen connected with a computer provided by an embodiment of the present application;

[0029] Figure 9 is a schematic diagram of image starting position information provided by an embodiment of the present application;

[0030] Figure 10 is a structural schematic diagram of an LED display screen provided by an embodiment of the present application. DETAILED DESCRIPTION

[0031] In the following description, specific details are set forth, such as particular system configurations, techniques, etc., in order to provide a thorough understanding of the embodiments of the present application. However, persons having ordinary skill in the art will readily understand that the present application can be practiced without these specific details, and that the present application is not limited to the embodiments described. In other instances, detailed descriptions of well-known systems, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.

[0032] It should be understood that the term "comprising" as used in the specification and in the claims indicates the presence of the recited features, integers, steps, operations, elements, and / or components, but does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and / or groups thereof.

[0033] It should also be understood that the term "and / or" as used in the specification and in the claims indicates any combination of one or more of the associated listed items and all possible combinations of the items.

[0034] In addition, in the description of the specification and the appended claims, the terms "first", "second", and the like are used only to distinguish descriptions, and cannot be understood as indicating or implying relative importance.

[0035] In the present specification, the reference "one embodiment" or "some embodiments" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Thus, the appearance of the phrases "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments", and the like in various places in the specification are not necessarily all referring to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically stated.

[0036] An LED display screen is a flat panel display device using light emitting diodes as pixel light emitting elements. When a complete LED display screen is formed by splicing multiple independent boxes, and the boxes need to rely on sending cards and receiving cards to work, too many nodes will result in too great difficulty in maintenance.

[0037] In order to reduce the difficulty of maintenance, the embodiment of the present application provides an LED display screen control method, in which the interface chip of the box is used to obtain the to-be-processed signal, and the image information included in the to-be-processed signal is intercepted and displayed.

[0038] Since the box in the control method can display the corresponding image information without the sending card and the receiving card, the number of nodes involved in the architecture of the LED display screen synchronous control system is greatly reduced, thereby reducing the difficulty of maintenance.

[0039] The LED display screen control method provided by the embodiment of the present application will be described below with reference to the drawings.

[0040] Figure 2 The structure diagram of the first box of the LED display screen provided by the embodiment of the present application is shown, and the first box is any one of the boxes constituting the LED display screen. Figure 2 In the embodiment, the first box 2 includes an interface chip 21, an MCU 22, an image interception module 23 and a display module 24.

[0041] The interface chip 21 obtains the to-be-processed signal, and the to-be-processed signal includes the image information.

[0042] The image interception module 23 intercepts the image information corresponding to the position information of the first box in the image information, and obtains the intercepted image information, and the position information of the first box reflects the position of the first box in the LED display screen.

[0043] The display module 24 displays the intercepted image information.

[0044] The MCU 22 controls the interface chip, the image interception module and the display module.

[0045] In the embodiment of the present application, the external device (computer or splicer) is connected with one box (hereinafter referred to as the first box) of the LED display screen, and sends the to-be-processed signal including the image information to the first box, and the first box sends the to-be-processed signal to the downstream box adjacent to the first box, and the box receiving the to-be-processed signal also sends the to-be-processed signal to the downstream box adjacent to the box, until all the boxes receive the same to-be-processed signal, and display the image information corresponding to the position information of the box. The image information can be information including specific image content, information including text content, or information including symbols, which is not limited here.

[0046] Specifically, when the first cabinet is the first cabinet connected with the external device (such as a computer or a splicer), the interface chip 21 of the first cabinet obtains the to-be-processed signal from the external device. When the first cabinet is not the first cabinet connected with the external device, the interface chip 21 of the first cabinet obtains the to-be-processed signal from the interface chip of the upstream cabinet adjacent to the first cabinet.

[0047] Optionally, the first cabinet of the LED display screen and the external device use a High-Definition Multimedia Interface (HDMI) protocol to transmit the to-be-processed signal. For example, the first cabinet of the LED display screen and the external device are connected by an HDMI line, and the external device sends the to-be-processed signal to the first cabinet of the LED display screen through the HDMI line.

[0048] In the embodiment of the application, the position information of the first cabinet is information that can reflect the position of the first cabinet in the LED display screen. The position information of the first cabinet can be pre-set or determined according to the splicing position after splicing. When the position information of the first cabinet is pre-set, the splicing needs to be performed according to the splicing strategy pre-set for each cabinet and containing the position information; when the position information of the first cabinet is determined according to the current splicing position, the splicing does not need to be performed according to the pre-set splicing strategy, but the position information of each cabinet needs to be determined after splicing.

[0049] Optionally, the position information can be represented in the form of coordinates. For example, assuming that the upper left corner of the LED display screen is taken as the origin of the coordinate system, the cabinet at the coordinate (0, 0) represents the first cabinet at the upper left corner of the LED display screen. Of course, the position information of the first cabinet can also be represented in the form of textual description information, which is not limited herein.

[0050] In the embodiment of the application, the image capturing module 23 determines the start and end image pixels corresponding to the first cabinet according to the coordinate information of the first cabinet and the number of pixel points that can be displayed by the first cabinet, captures the corresponding image information in the image information according to the start and end image pixels, obtains the captured image information, and displays the captured image information through the display module 24. The display module 24 can be a lamp panel.

[0051] It should be noted that the logical implementation processes of the interface chip 21, the image capturing module 23 and the display module 24 in the first cabinet 1 all need to be controlled by the MCU 22. For example, the MCU 22 controls the interface chip 21 to obtain the to-be-processed signal in which way, the MCU 22 controls the image capturing module 23 to capture the image information in which way, and the like.

[0052] In the embodiment of the present application, the first cabinet of the LED display screen comprises an interface chip, an MCU, an image intercepting module and a display module. The LED display screen obtains the to-be-processed signal comprising image information through the interface chip, intercepts the image information corresponding to the position information of the first cabinet in the image information through the image intercepting module, and displays the obtained intercepted image information through the display module. Since the first cabinet obtains the to-be-processed signal through the interface chip when obtaining the to-be-processed signal, it is not necessary to obtain the to-be-processed signal through the sending card and the receiving card, thus greatly reducing the node level involved in the architecture of the synchronous control system of the LED display screen (the reduced node level is 2 levels), and reducing the network cable connected between the LED display screen and the external device (such as no longer needing the sending card and the network cable connected between the sending card and the cabinet), so as to reduce the maintenance difficulty of the LED display screen when the LED display screen fails. Moreover, since the LED display screen no longer depends on the sending card and the receiving card, the development of the LED display screen is not limited by the sending card and the receiving card, thus being conducive to the development of the LED display screen in the direction of standardization.

[0053] In some embodiments, the above-mentioned interface chip 21 comprises an HDMI interface and / or an optical fiber interface, and correspondingly, the interface chip 21 is specifically used for:

[0054] obtaining the above-mentioned to-be-processed signal through the above-mentioned HDMI interface and / or the above-mentioned optical fiber interface.

[0055] The HDMI interface is a physical connection standard of digital audio and video integration, which is used to transmit high-definition or ultra-high-definition video and multi-channel audio from a signal source (such as a computer, a set-top box, a game console, a Blu-ray player) to a display device (such as a television, a monitor, a projector) in a lossless digital way.

[0056] The optical fiber interface refers to a general term of physical connection ports and supporting protocol standards for transmitting data or audio and video signals in optical fibers.

[0057] In the embodiment of the present application, the input interface of the interface chip 21 can be an HDMI interface and / or an optical fiber interface, and the output interface of the interface chip 21 can be an HDMI interface. For example, when the input interface of the interface chip 21 is an HDMI interface, the interface chip 21 receives the to-be-processed signal from the external device or the interface chip of the upstream cabinet adjacent to the first cabinet through the HDMI interface. For example, when the first cabinet is the first cabinet connected with the external device, the external device can be connected with the optical fiber interface of the interface chip 21 through the optical fiber, at this time, the interface chip 21 receives the to-be-processed signal from the external device through the optical fiber interface. When the first cabinet is not the first cabinet connected with the external device, the interface chip 21 receives the to-be-processed signal from the interface chip of the upstream cabinet adjacent to the first cabinet through the HDMI interface.

[0058] When the interface chip 21 includes a fiber interface and signals are transmitted through the fiber interface, the signals transmitted through the fiber are less likely to be stolen and more secure, and thus, the security of the signals is improved when the signals are transmitted through the fiber interface.

[0059] In some embodiments, considering that an LED display screen is usually composed of multiple cabinets, and a cabinet can fail, if only one path of the to-be-processed signals is transmitted between the cabinets, after a cabinet fails, the cabinet that fails will stop transmitting the to-be-processed signals to downstream cabinets, thereby affecting the display effect of the LED display screen. In order to reduce the influence of the cabinet failure on the display effect of the LED display screen, the interface chip 21 is provided to include at least two input interfaces and at least three output interfaces. That is:

[0060] The number of the input interfaces of the interface chip 21 is greater than or equal to 2, and the number of the output interfaces of the interface chip 21 is greater than or equal to 3.

[0061] When the interface chip 21 obtains the to-be-processed signals, the interface chip 21 is specifically configured to:

[0062] When the first cabinet is the first cabinet connected to the external device of the LED display screen, the one path of the to-be-processed signals transmitted by the external device is received through the input interface. When the first cabinet is not the first cabinet connected to the external device of the LED display screen, at least two paths of the to-be-processed signals transmitted by different adjacent upstream cabinets in communication connection with the first cabinet are respectively received through the input interface.

[0063] The to-be-processed signals are respectively output to at least two second cabinets through at least two output interfaces, where the second cabinets are adjacent downstream cabinets in communication connection with the first cabinet.

[0064] In the embodiments of the present application, the interface chip 21 obtains the to-be-processed signals, which includes receiving the to-be-processed signals, which is divided into two cases:

[0065] (1) When the first cabinet is the first cabinet (i.e., the first cabinet) connected to the external device of the LED display screen, the one path of the to-be-processed signals transmitted by the external device is received through one of the input interfaces of the interface chip 21. Of course, if each input interface of the interface chip 21 of the first cabinet is connected to the external device, the interface chip 21 will select one of the input interfaces to receive the to-be-processed signals, for example, the input interface connected to the external device first is selected to receive the to-be-processed signals.

[0066] (II) When the first cabinet is not the first cabinet connected with the external device, the interface chip 21 receives at least two signals to be processed sent by the adjacent upstream cabinet connected with the first cabinet through at least two input interfaces of the interface chip 21. For example, the interface chip 21 receives two signals to be processed sent by the adjacent upstream cabinet connected with the first cabinet through two input interfaces of the interface chip 21.

[0067] In the embodiment of the present application, one output interface of the at least three output interfaces of the interface chip 21 outputs the signal to be processed which is intercepted by the image intercepting module 23, and the remaining at least two output interfaces output the signal to be processed to the respective second cabinets. For example, when the number of the second cabinets is two, the interface chip 21 has two output interfaces which output the signal to be processed to the two second cabinets.

[0068] In the embodiment of the present application, when the first cabinet is not the first cabinet connected with the external device, the interface chip 21 receives at least two signals to be processed sent by the adjacent upstream cabinet connected with the first cabinet through at least two input interfaces of the interface chip 21. For example, the interface chip 21 receives two signals to be processed sent by the adjacent upstream cabinet connected with the first cabinet through two input interfaces of the interface chip 21.

[0069] In some embodiments, considering that the total number of columns of video pixels of the image information contained in the signal to be processed can be large (the total number of columns of video pixels can be 2K-8K), and the total number of columns of video pixels of the image information that can be displayed by the cabinet is small (the total number of columns of video pixels is usually 2K), therefore, when it is difficult to realize the cutting of the image information at low cost by using one chip, two chips can be selected to realize the cutting of the image information. That is, the image intercepting module 23 includes a first image cutting unit and a second image cutting unit. When the image intercepting module 23 intercepts the image information corresponding to the position information of the first cabinet in the image information to obtain the intercepted image information, it includes:

[0070] The first image clipping unit clips the image information of one of the signals to be processed output by the interface chip 21 according to the position information of the first cabinet, to obtain intermediate image information, wherein the intermediate image information includes the image information corresponding to the position information of the first cabinet, and the total column number of the video pixels of the intermediate image information is less than or equal to the total column number of the video pixels of the image information that can be displayed by the first cabinet.

[0071] The second image clipping unit clips the intermediate image information according to the position information of the first cabinet, to obtain the intercepted image information.

[0072] When the total column number of the video pixels of the image information contained in the signal to be processed is mK-nK (e.g. 2K-8K), the first image clipping unit is a mK-nK (e.g. 2K-8K) video cutting chip, wherein m is usually 2 or 4, and n is usually 4 or 8.

[0073] Specifically, when the interface chip 21 includes three output interfaces, one of the output interfaces outputs a signal to be processed that will be sent to the first image clipping unit, and the remaining two output interfaces of the interface chip 21 output signals to be processed that will be sent to two second cabinets respectively. The first image clipping unit clips the input image information to reduce the total column number of the video pixels. For example, assuming that the total column number of the video pixels of the image information contained in the signal to be processed is 4K, and the total column number of the video pixels of the image information that can be displayed by the first cabinet is 2K, the first image clipping unit clips the image information of the signal to be processed, and the obtained intermediate image information contains the image information corresponding to the position information of the first cabinet, and the total column number of the video pixels of the intermediate image information can be 2K. Then, the second image clipping unit clips the intermediate image information again to obtain the intercepted image information.

[0074] In the embodiments of the present application, when a single chip is used to obtain the screenshot image information matched with the first cabinet, the chip may need to have a powerful function, which leads to a high cost of producing the chip. Therefore, two different chips can be used to clip the image information contained in the signal to be processed twice, and since the cost of producing the two chips is low, the screenshot image information matched with the first cabinet can be obtained at a low cost.

[0075] In order to more clearly describe the process of clipping the image information contained in the signal to be processed twice by two different chips, the process will be described below in combination with Figure 3 .

[0076] In Figure 3In the description, HDMI2.1 and HDMI1.4 respectively represent the protocol version numbers of HDMI as “2.1” and “1.4”. The first cabinet Figure 3 The interface chip included in the display module (not shown) has 4 input interfaces, of which 2 input interfaces are HDMI interfaces (HDMI2.1 IN1 and HDMI2.1 IN2 respectively), and the other 2 input interfaces are fiber interfaces (FIBERIN1 and FIBERIN2 respectively).

[0077] Figure 3 In the description, the interface chip included in the first cabinet has 4 output interfaces, one of which outputs the input first image cropping unit for image cropping to obtain intermediate image information, and the intermediate image information is input into the second image cropping unit for image cropping to obtain the intercepted image information. Among the remaining three output interfaces of the interface chip, 2 output interfaces output 2-way to-be-processed signals (i.e. Figure 3 HDMI2.1 OUT1 and HDMI2.1 OUT2 in the description) to the second cabinet, and the remaining one output interface can not output the to-be-processed signal.

[0078] In some embodiments, when there is an extra output interface of the interface chip (for example, when the interface chip includes 4 output interfaces, but only 3 output interfaces are actually needed, and there will be 1 extra output interface), the extra output interface of the last cabinet in the LED display screen can be connected with a monitoring device, which receives the to-be-processed signal output by the extra output interface of the last cabinet and displays the image information contained in the to-be-processed signal. Since the image information displayed by the monitoring device is the same as the image information displayed by the entire LED display screen, it is beneficial for the user to view the image information displayed by the LED display screen in a timely manner through the monitoring device.

[0079] In the above description, the chip with the image cropping function is used to intercept the image information, and in some embodiments, the Field-Programmable Gate Array (FPGA) can also be used to realize the interception of the image information. At this time, the image interception module 23 includes a serial-parallel conversion unit, an FPGA, and a storage unit. When the image interception module 23 intercepts the image information corresponding to the position information of the first cabinet in the image information to obtain the intercepted image information, it includes:

[0080] The serial-parallel conversion unit converts the to-be-processed signal output by the interface chip 21 in a serial manner into a to-be-processed signal in a parallel manner.

[0081] The field programmable gate array stores the parallel to-be-processed signals into the storage unit, and obtains the image information corresponding to the position information of the first box from the image information included in the parallel to-be-processed signals stored in the storage unit.

[0082] In the embodiment, the interface chip 21 outputs at least three identical to-be-processed signals, one of which is input into the serial-to-parallel conversion unit. Since the to-be-processed signals output by the interface chip 21 are serial signals, and the FPGA is more skilled in processing parallel signals, the serial signals can be converted into parallel signals before being input into the FPGA, which is beneficial to expand the throughput and reduce the delay. For example, when the serial signals are low-voltage differential signals (Low-Voltage Differential Signaling, LVDS), the LVDS signals are converted into parallel transistor-transistor logic (TTL) signals, and then input into the FPGA, so that the FPGA temporarily stores the received parallel to-be-processed signals in the storage unit.

[0083] Optionally, the storage unit can be a second generation double data rate synchronous dynamic random access memory (Double Data Rate 2, DDR2) or a third generation double data rate synchronous dynamic random access memory (Double Data Rate 3, DDR3), etc., which is not limited here.

[0084] Since the FPGA is functionally reconfigurable, and has high throughput and low delay, when the FPGA is used to intercept the image information, the fast-changing and real-time requirements can be met.

[0085] In order to more clearly describe the process of image cutting of the image information included in the to-be-processed signals by the FPGA, the following will be described in combination with Figure 4 .

[0086] The first box ( Figure 4 The interface chip included in the first box (not shown) has four input interfaces, of which two are HDMI interfaces (HDMI2.1 IN1 and HDMI2.1 IN2, respectively), and the other two are fiber interfaces (FIBERIN1 and FIBERIN2, respectively).

[0087] Figure 4In the above introduction, the first box includes an interface chip having four output interfaces, one of the output interfaces outputs an input serial-parallel conversion unit to perform serial-parallel conversion on the to-be-processed signal, and the obtained parallel to-be-processed signal is temporarily stored in a storage unit through an FPGA, and the FPGA further performs image information interception on the parallel to-be-processed signal stored in the storage unit according to the position information of the first box to obtain intercepted image information. Among the remaining three output interfaces of the interface chip, two output interfaces output two to-be-processed signals (namely HDMI2.1 OUT1 and HDMI2.1 OUT2 in the above embodiment) to the second box, and the remaining one output interface does not output the to-be-processed signal. Figure 3

[0088] In the above introduction, the process of how the first box obtains the image information displayed by the first box according to the position information of the first box is mainly introduced, that is, the process of how the intercepted image information is obtained according to the position information of the first box is introduced. The process of how the position information of the first box is obtained will be introduced below.

[0089] In the embodiment of the present application, the position information of the first box can be obtained through a network cable or through an Inter-Integrated Circuit (IIC) bus.

[0090] In some embodiments, when the position information of the first box is obtained through a network cable, the first box further includes a network chip.

[0091] The network chip receives the configuration parameter and sends the configuration parameter to the MCU, the MCU determines whether the configuration parameter contains the position information of the box, if the position information of the box is not contained, the first box is regarded as the first box connected to the external device of the LED display screen, and the position information of the first box is determined according to the first box. If the position information of the box is contained, the position information of the first box is determined according to the position information of the box and the relative position relationship between the box sending the configuration parameter and the first box.

[0092] The network chip included in the first box is used to manage two management ports, one of which is used to input the configuration parameter, and the other is used to output the configuration parameter, such as outputting the position information of the first box to the second box. Alternatively, the management port can be an RJ45 configuration port, at this time, the boxes can be connected through a network cable. Specifically, the network chip receives the configuration parameter through the management port for inputting the configuration parameter, and sends the configuration parameter to the MCU through a Serial Peripheral Interface (SPI), and the MCU determines the position information of the first box in which the configuration parameter is located after receiving the configuration parameter.

[0093] ​In the embodiment of the present application, the relative position relationship between the box and the first box can be determined according to the management port receiving the configuration parameter. For example, assuming that the management port A is used to receive the information output by the output interface of the interface chip of the box located below the first box, and the management port B is used to receive the information output by the output interface of the interface chip of the box located on the left side of the first box, if the management port A receives the configuration parameter, the MCU will determine that the box sending the configuration parameter is located below the first box, and the MCU will change the information affecting the longitudinal position in the position information of the box contained in the configuration parameter, thereby obtaining the position information of the first box.

[0094] In the embodiment of the present application, since each box has a network chip for managing two management ports (such as RJ45 configuration ports) on the box, the network chip is connected to the MCU on the box through SPI to receive and process the configuration parameter, therefore, the configuration parameter can be transmitted between the boxes through the RJ45 cascade.

[0095] In order to more clearly describe the process of determining the position information of the box, the following will be described in combination with Figure 5 .

[0096] In Figure 5 , M1, M2, M3, M4, M5, M6, M7, M8, and M9 are the number marks of the boxes, wherein M1 is the first box connected with the LED display screen and the external device.

[0097] When the network chip of M1 receives the configuration parameter, the configuration parameter is sent to the MCU of M1. Since M1 is the first box connected with the LED display screen and the external device, the MCU of M1 determines that the received configuration parameter does not contain the position information of the box, at this time, the MCU of M1 sets the position information of M1 as (x0, y0).

[0098] Assuming that one output interface of the interface chip of M1 outputs the to-be-processed signal to M2, and one output interface outputs the to-be-processed signal to M4, then:

[0099] When the network chip of M2 receives the configuration parameter sent by M1, the configuration parameter is sent to the MCU of M2. Since M2 is not the first box connected with the LED display screen and the external device, the MCU of M2 determines that the received configuration parameter contains the position information (x0, y0) of the box. Since M2 is located above M1, the MCU of M2 sets the position information of M2 as (x0, y1), which is used to represent the increment in the longitudinal direction.

[0100] Similarly, the position information of M3, M4, M5, M6, M7, M8 and M9 is (x0, y2), (x1, y0), (x1, y1), (x1, y2), (x2, y0), (x2, y1) and (x2, y2) respectively. At this time, the current LED display screen is a 3x3 display screen.

[0101] Optionally, considering that the physical image position coordinates of the screen body are taken as the (0, 0) point at the upper left corner, the y coordinate of each box can be flipped, and the image position coordinates of the corresponding box screen can be obtained by subtracting the y coordinate of each box from the maximum row number, that is, the image position coordinate diagram shown in Figure 6 is obtained.

[0102] In some embodiments, the MCU includes at least 2 first serial ports, and the at least 2 first serial ports are connected to the integrated circuit interconnection bus of the at least 2 input interfaces of the interface chip. Correspondingly, the MCU receives the configuration parameters through the at least 1 first serial port, judges whether the configuration parameters contain the position information of the box, if the configuration parameters do not contain the position information of the box, takes the first box as the first box connected to the external device, and determines the position information of the first box according to the first box. If the configuration parameters contain the position information of the box, the position information of the first box is determined according to the position information of the box and the relative position relationship between the box sending the configuration parameters and the first box.

[0103] In the embodiments of the present application, the process of the MCU obtaining the configuration parameters and determining the position information of the first box through IIC is similar to the process of the MCU obtaining the configuration parameters and determining the position information of the first box through the network chip, and the difference lies in the way of obtaining the configuration parameters, one is obtained through IIC line, and the other is obtained through the network chip.

[0104] Optionally, in addition to the at least 2 first serial ports, the MCU of the first box also includes at least 2 second serial ports, and the at least 2 second serial ports are connected to the integrated circuit interconnection bus of the at least 2 output interfaces of the interface chip, so as to send the configuration parameters of the first box to the second box.

[0105] Reference Figure 7 , Figure 7 A structure diagram of a box with 4 serial ports instantiated in the MCU of the box is shown.

[0106] In Figure 7In the embodiment, the four serial ports instantiated by the MCU on the first cabinet are connected to the IIC lines of IN1, IN2, OUT1 and OUT2 of the interface chip respectively, so as to perform configuration parameter transmission through the multiplexed IIC line. Specifically, the serial port 1 and the serial port 2 are the two first serial ports, and the serial port 3 and the serial port 4 are the two second serial ports. In the initial stage of video transmission, the IIC line is used to transmit basic information of the video, such as resolution, time length, clock and the like. After the transmission of the basic information of the video is completed, the configuration parameters (such as position information of the cabinet) can be transmitted through the IIC line. Through the above-mentioned multiplexed IIC line, the utilization rate of the IIC line can be improved.

[0107] In order to more clearly describe the LED display screen control method provided by the embodiment of the present application, the following will be described in combination with Figure 8 .

[0108] Figure 8 The structure schematic diagram of the LED display screen connected with the computer provided by the embodiment of the present application is shown.

[0109] In Figure 8 , the LED display screen is a complete 3x3 display screen, the computer is directly connected to the screen body through an HDMI line and an RJ45 network cable, the HDMI line is responsible for the transmission of the video signal, and the RJ45 network cable is responsible for the transmission of the configuration parameters. Among them, M1-M9 are the number identification of the cabinet, each cabinet has four HDMI lines in up, down, left and right directions, wherein IN1 and IN2 are two HDMI input lines, OUT1 and OUT2 are two HDMI output lines, OUT1 of the cabinet is connected to IN1, and OUT2 of the cabinet is connected to IN2, to form a cross connection mode. In this cross connection mode, if one of the lines between the cabinets fails, it can still be cascaded through the other line, that is, the cross connection mode with two input lines and two output lines has a backup function. There are two modes for the transmission of the configuration parameters between the cabinets. The first mode is that each cabinet has a network chip to manage two RJ45 configuration ports on the cabinet, the network chip is connected to the MCU on the cabinet through SPI to receive and process the configuration parameters, and the configuration parameters between the cabinets can be transmitted through the RJ45 cascade. The second mode is that the MCU on the cabinet instantiates four serial ports, which are connected to the IIC lines of IN1, IN2, OUT1 and OUT2 respectively, to transmit the configuration parameters through the multiplexed IIC line. The configuration parameters herein include the position information of the cabinet.

[0110] Through the above cross connection mode and the auxiliary cooperation of the MCU, the function of automatic screen connection can be realized.

[0111] After the MCU of each cabinet determines the position information of the cabinet where the MCU is located according to the position information transmitted by the adjacent upstream cabinet, the MCU can control the image interception module to intercept the image information. Specifically, the MCU first calculates the starting pixel position of the screen corresponding to the cabinet where the MCU is located, and the process is as follows:

[0112] It is assumed that each cabinet will save the horizontal pixel number and the vertical pixel number of the cabinet when it is shipped, and the assumption is 480x270. The MCU reads back the saved horizontal pixel number and vertical pixel number, and then multiplies the image position coordinates corresponding to the cabinet to obtain the corresponding image starting point. Assuming that the image position coordinates of each cabinet are as shown in Figure 6 , after multiplying these image position coordinates by 480 or 270, the image starting position information shown in Figure 9 is obtained.

[0113] Figure 10 A structure diagram of an LED display screen provided in an embodiment of the present application is shown. In Figure 10 , the LED display screen includes nine first cabinets, and each of the first cabinets includes an interface chip, an MCU, an image interception module, and a display module.

[0114] The above-mentioned LED display screen is controlled by the above-mentioned LED display screen control method.

[0115] The specific implementation process of the interface chip, the MCU, the image interception module, and the display module is described in the above-mentioned embodiments, and will not be described here.

[0116] In the embodiment of the present application, the first cabinet of the LED display screen includes an interface chip, an MCU, an image interception module, and a display module. The LED display screen obtains the to-be-processed signal including image information through the interface chip, intercepts the image information corresponding to the position information of the first cabinet in the image information through the image interception module, and displays the obtained intercepted image information through the display module. Since the first cabinet obtains the to-be-processed signal through the interface chip when obtaining the to-be-processed signal, it does not need to obtain the to-be-processed signal through the sending card and the receiving card, thereby greatly reducing the node level involved in the architecture of the LED display screen synchronous control system (the reduced node level is 2 levels), and reducing the network cable connected between the LED display screen and the external equipment (such as no longer needing the sending card and the network cable connected between the sending card and the cabinet), thereby reducing the maintenance difficulty of the LED display screen when the LED display screen fails. Moreover, since the LED display screen no longer depends on the sending card and the receiving card, the development of the LED display screen is not limited by the sending card and the receiving card, thereby facilitating the development of the LED display screen in the direction of standardization.

[0117] Those skilled in the art can clearly understand that, for the convenience and brevity of description, only the above-mentioned division of each functional unit and module is exemplified, and in actual application, the above-mentioned functions can be completed by different functional units and modules according to needs, that is, the internal structure of the above-mentioned device is divided into different functional units or modules to complete all or part of the functions described above. Each functional unit and module in the embodiment can be integrated in one processing unit, or each unit can be physically present separately, or two or more units can be integrated in one unit. The integrated unit can be realized in the form of hardware or software functional unit. In addition, the specific name of each functional unit and module is only for easy distinction, and does not limit the protection scope of the application. The specific working process of the unit and module in the above system can refer to the corresponding process in the foregoing method embodiment, which will not be described here.

[0118] The embodiment of the application further provides a computer readable storage medium, the computer readable storage medium stores a computer program, and the computer program is executed by a processor to implement the steps in each method embodiment.

[0119] The embodiment of the application provides a computer program product, when the computer program product runs on an electronic device, so that the electronic device executes the steps in each method embodiment.

[0120] The integrated unit, if realized in the form of a software functional unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on this understanding, the application implements all or part of the processes in the above embodiment methods, which can be completed by a computer program instructing related hardware. The computer program can be stored in a computer readable storage medium. The computer program, when executed by a processor, can implement the steps in each method embodiment. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms. The computer readable medium at least includes any entity or device capable of carrying the computer program code to the photographing device / electronic device, recording medium, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signal, telecommunication signal and software distribution medium. For example, U disk, mobile hard disk, magnetic disk or optical disk, etc. In some jurisdictions, according to legislation and patent practice, the computer readable medium cannot be an electrical carrier signal and a telecommunication signal.

[0121] In the above embodiments, the description of each embodiment focuses on different aspects, and the parts not described or recorded in a certain embodiment can be referred to the relevant description of other embodiments.

[0122] Those skilled in the art can realize that the units and algorithm steps of each example described in combination with the embodiments disclosed herein can be realized by electronic hardware or a combination of computer software and electronic hardware. Whether the functions are realized in hardware or software depends on the specific application and design constraints of the technical solution. The skilled person can use different methods to realize the described functions for each specific application, but such implementation should not be considered beyond the scope of the present application.

[0123] In the embodiments provided in the present application, it should be understood that the disclosed apparatus / network device and method can be implemented in other ways. For example, the apparatus / network device embodiments described above are merely schematic, for example, the division of the modules or units is only a logical function division, and actual implementation can have another division manner, for example, a plurality of units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, and can be electrical, mechanical or other forms.

[0124] The units described as separate components can or can not be physically separated, and the components shown as units can or can not be physical units, that is, they can be located in one place, or can be distributed on a plurality of network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the embodiments.

[0125] The above described embodiments are only used to illustrate the technical solutions of the present application, but not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that the technical solutions recorded in the foregoing embodiments can be modified, or some technical features can be replaced by equivalents; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present application.

Claims

1. A method for controlling an LED display screen, characterized in that, A first cabinet for an LED display screen, the first cabinet including an interface chip, an MCU, an image capture module, and a display module, wherein the LED display screen control method includes: The interface chip acquires a signal to be processed, which includes image information. The image cropping module extracts the image information corresponding to the position information of the first box from the image information to obtain the cropped image information. The position information of the first box reflects the position of the first box on the LED display screen. The display module displays the captured image information; The MCU controls the interface chip, the image capture module, and the display module.

2. The LED display screen control method as described in claim 1, characterized in that, The interface chip includes an HDMI interface and / or an optical fiber interface. When acquiring a signal to be processed, the interface chip is specifically used for: The signal to be processed is obtained through the HDMI interface and / or the optical fiber interface.

3. The LED display screen control method as described in claim 2, characterized in that, The number of input interfaces of the interface chip is greater than or equal to 2, and the number of output interfaces of the interface chip is greater than or equal to 3; When acquiring the signal to be processed, the interface chip is specifically used for: When the first cabinet is the first cabinet for connecting the LED display screen to the external device, one channel of the signal to be processed sent by the external device is received through the input interface. When the first cabinet is not the first cabinet for connecting the LED display screen to the external device, at least two channels of the signal to be processed sent by different adjacent upstream cabinets that are connected to the first cabinet are received through the input interface. The signal to be processed is output to at least two second enclosures through at least two output interfaces, wherein the second enclosure is an adjacent downstream enclosure that is communicatively connected to the first enclosure.

4. The LED display screen control method as described in claim 1, characterized in that, The image cropping module includes a first image cropping unit and a second image cropping unit. The image cropping module crops image information corresponding to the position information of the first box from the image information. Obtaining the cropped image information includes: The first image cropping unit performs image cropping on the image information of one channel of signal to be processed output by the interface chip according to the position information of the first box, to obtain intermediate image information. The intermediate image information includes the image information corresponding to the position information of the first box, and the total number of columns of video pixels of the intermediate image information is less than or equal to the total number of columns of video pixels of the image information that the first box can display. The second image cropping unit performs image cropping on the intermediate image information based on the position information of the first box to obtain the cropped image information.

5. The LED display screen control method as described in claim 1, characterized in that, The image cropping module includes a serial-to-parallel conversion unit, a field-programmable gate array (FPGA), and a storage unit. The image cropping module extracts image information corresponding to the position information of the first housing from the image information. Obtaining the cropped image information includes: The serial-to-parallel conversion unit converts the serial signal to be processed output by the interface chip into a parallel signal to be processed. The field-programmable gate array stores the parallel signals to be processed into the storage unit, and extracts the image information corresponding to the position information of the first box from the image information included in the parallel signals to be processed stored in the storage unit to obtain the extracted image information.

6. The LED display screen control method according to any one of claims 1 to 5, characterized in that, The first enclosure also includes a network chip; The network chip receives configuration parameters and sends the configuration parameters to the MCU. The MCU determines whether the configuration parameters contain the location information of the cabinet. If the configuration parameters do not contain the location information of the cabinet, the first cabinet is used as the first cabinet for connecting the LED display screen to the external device, and the location information of the first cabinet is determined based on the first cabinet. If the configuration parameters contain the location information of the cabinet, the location information of the first cabinet is determined based on the location information of the cabinet and the relative position relationship between the cabinet that sent the configuration parameters and the first cabinet.

7. The LED display screen control method according to any one of claims 1 to 5, characterized in that, The MCU includes at least two first serial ports, and the at least two first serial ports are connected to the integrated circuit interconnect bus of at least two input interfaces of the interface chip; The MCU receives configuration parameters through at least one of the first serial ports, determines whether the configuration parameters include the location information of the cabinet, and if the location information of the cabinet is not included, the first cabinet is used as the first cabinet for connecting the LED display screen to the external device, and the location information of the first cabinet is determined based on the first cabinet. If the location information of the cabinet is included, the location information of the first cabinet is determined based on the location information of the cabinet and the relative position relationship between the cabinet that sent the configuration parameters and the first cabinet.

8. An LED display screen, characterized in that, It includes multiple first boxes, each of which includes an interface chip, an MCU, an image capture module, and a display module; The LED display screen is controlled by the LED display screen control method as described in any one of claims 1 to 7.

9. A computer-readable storage medium storing a computer program, characterized in that, When the computer program is executed by a processor, it implements the method as described in any one of claims 1 to 7.

10. A computer program product, characterized in that, Includes a computer program, which, when run, causes the method as described in any one of claims 1 to 7 to be performed.

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