LED display system, display module and signal transmission method
By using the design of receiving cards to output in columns and modules to cascade, the problem of complex LED display construction is solved, and flexible splicing and expansion of modules are realized, reducing construction difficulty and supporting plug-and-play functionality.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- CHIPONE TECHNOLOGY (BEIJING) CO LTD
- Filing Date
- 2026-03-18
- Publication Date
- 2026-06-26
AI Technical Summary
The existing LED display screens are complex to build, difficult to install, require highly skilled workers, and cannot be flexibly expanded or adjusted.
The design adopts a column-by-column output of the receiver card. The display modules are cascaded together. The receiver card automatically identifies topology changes and adjusts the signal segmentation, enabling arbitrary placement of the modules and automatic topology identification. The built-in conversion module ensures stable signal transmission.
It reduces construction difficulty and labor costs, enables flexible splicing and expansion of modules, supports plug-and-play functionality, and simplifies troubleshooting and maintenance.
Smart Images
Figure CN122290490A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of display technology, and more specifically, to an LED display system, a display module, and a signal transmission method. Background Technology
[0002] With the rapid development of LED (Light Emitting Diode) display technology, LED displays have gradually gained market acceptance due to their advantages such as high brightness, long lifespan, frameless design, and flexible size splicing. They are widely used in conference rooms, entrance screens, monitoring rooms, urban transportation, and large-scale event venues. As the LED industry develops, the resolution of LED displays is also gradually improving. Large LED displays are typically composed of multiple LED modules spliced together. This splicing involves not only the splicing of display panels but also the corresponding connection of their signal lines.
[0003] In existing technologies, display data is typically sent by a transmitting card, received by a receiving card which then processes the data by segmenting it as needed, and finally provides the corresponding data to the respective LED display modules. This process involves complex wiring. Therefore, building a display screen containing multiple LED display modules requires not only splicing the display panels but also connecting signal lines according to a specific interface sequence. Figure 1 As shown, the first module needs to be placed in the upper left position and connected to the first interface of the receiving card. The second module needs to be placed below the first module and connected to the second interface of the receiving card. The third module needs to be placed to the right of the first module and connected to the third interface of the receiving card. The fourth module needs to be placed below the third module and to the right of the second module and connected to the fourth interface of the receiving card. After the connection is completed, further testing and verification of the wiring and module connections are required. This scheme significantly increases the installation difficulty and complexity, and also places high demands on the skill level of the workers installing the system. Furthermore, if it is necessary to add LED modules to an existing display screen for horizontal or vertical expansion, the modules and wiring must be completely readjusted and tested again.
[0004] Therefore, there is an urgent need for an LED display system that can be easily set up and used. Summary of the Invention
[0005] The purpose of this invention is to provide an LED display system that reduces the difficulty of installation, enhances its ease of use, and improves the stability of data transmission.
[0006] According to one aspect of the present invention, an LED display system is provided, comprising: a transmitting card; a receiving card connected to the transmitting card, the receiving card being provided with a first conversion module corresponding to the number of columns of display modules; and a plurality of display modules arranged in an array, the display modules in the same column being cascaded sequentially, each column of display modules being connected to a corresponding first conversion module in the receiving card.
[0007] Optionally, each of the display modules includes: a second conversion module, configured to convert column display control signals from the first conversion module or the preceding display module into data signals and scan signals; a driver chip, configured to receive the data signals, provide the data signals to the display panel of the current display module, and transmit the data signals to the third conversion module; a scan drive circuit, configured to receive the scan signals, provide the scan signals to the display panel of the current display module; and a third conversion module, configured to restore the data signals and scan signals into column display control signals and output them to the subsequent display module.
[0008] Optionally, the column display control signal is transmitted between the receiving card and the display module, and between the display modules cascaded in the same column, in the form of a low-voltage differential data signal.
[0009] In the aforementioned display system, the first conversion module and the second conversion module, as well as the adjacent cascaded third conversion module and the second conversion module, are connected by differential pairs, and the differential pairs are equipped with DC blocking capacitors.
[0010] Optionally, the data signal is a transistor-to-transistor logic signal, including display data and at least one of a clock signal and a latch signal, and the scan signal includes a row selection signal.
[0011] Optionally, the structure of the third conversion module is the same as that of the first conversion module.
[0012] Optionally, a synchronization signal channel is provided between the second conversion module and the third conversion module for transmitting vertical synchronization signals and transmitting the vertical synchronization signals step by step to the subsequent display module.
[0013] Optionally, the receiving card is configured to obtain new module quantity and arrangement information by polling after the display module array undergoes horizontal and / or vertical expansion, and adjust the segmentation method of the original display control signal accordingly.
[0014] According to another aspect of the present invention, an LED display module is provided for the aforementioned LED display system. The display module includes: a second conversion module for converting column display control signals from the first conversion module or a preceding display module into data signals and scan signals; a driver chip for receiving the data signals, providing the data signals to the display panel of the current display module, and transmitting the data signals to a third conversion module; a scan drive circuit for receiving the scan signals and providing the scan signals to the display panel of the current display module; and a third conversion module for restoring the data signals and scan signals into column display control signals and outputting them to a subsequent display module.
[0015] Optionally, the second conversion module and the third conversion module are further configured such that, when the driver chip fails, the third conversion module directly obtains data signals from the second conversion module via the vertical synchronization signal channel and continues to output them to the next stage.
[0016] According to another aspect of the present invention, a signal transmission method for an LED display system is provided, comprising: a transmitting card outputting an original display control signal to a receiving card; the receiving card dividing the original display control signal into columns to form corresponding column display control signals; the receiving card converting the column display control signals into low-voltage differential data signals and providing them to the first display module of the corresponding column; the display module converting the low-voltage differential data signals and driving the display module at this level to display an image according to the corresponding data therein; the display module restoring the corresponding data into low-voltage differential data signals and providing them to subsequent display modules until the last display module of the column completes the display.
[0017] Optionally, after detecting a horizontal and / or vertical expansion of the display module array, the receiving card automatically polls and updates the number and arrangement information of the modules, and adjusts the segmentation strategy accordingly.
[0018] Optionally, when the display module resolves that the current display screen is the end screen of the current column, it stops outputting data to the next level to save power consumption.
[0019] The LED display system, display module, and signal transmission method provided in this application are designed to allow the receiving card to output in columns. Display modules in the same column only need to be cascaded one-to-one, eliminating the need to connect display modules at specific positions to their corresponding interfaces. Workers can place modules arbitrarily from left to right and from top to bottom to complete the cascading between adjacent modules in the same column, significantly reducing construction difficulty and labor costs. Furthermore, this LED display system can automatically identify the topology and segment the screen after the module array is changed horizontally or vertically, without requiring manual reconfiguration, achieving "plug and play". The second and third conversion modules within the display module are also connected for data transmission, thereby achieving vertical synchronization. Even if the driver chip of this display module fails, it does not affect the transmission of signals to subsequent display modules, facilitating troubleshooting and maintenance. The LED display system provided by this invention greatly reduces the complexity of LED display screen construction, making LED displays suitable for flexible rental and other application scenarios. Attached Figure Description
[0020] The above and other objects, features and advantages of the present invention will become clearer from the following description of embodiments of the invention with reference to the accompanying drawings.
[0021] Figure 1 A schematic diagram of the wiring connections for an existing LED display screen is shown.
[0022] Figure 2 A schematic diagram of an LED display system according to a first embodiment of the present invention is shown;
[0023] Figure 3 A schematic diagram of an LED display system according to a second embodiment of the present invention is shown;
[0024] Figure 4 A schematic flowchart illustrating the signal transmission method of an LED display system according to an embodiment of the present invention is shown. Detailed Implementation
[0025] The present invention will now be described in more detail with reference to the accompanying drawings. To facilitate understanding of this application, a more complete description will be given below with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. However, the present application may be implemented in different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided to provide a thorough and complete understanding of the disclosure of this application.
[0026] References to "one embodiment" or "some embodiments" as described in this specification mean that one or more embodiments of this application include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.
[0027] In the description of this application, the words "exemplary" or "for example" are used to indicate that they are examples, illustrations, or descriptions. Any embodiment described as "exemplary" or "for example" in this application should not be construed as being more preferred or advantageous than other embodiments. "And / or" in this document describes an association relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A alone, A and B simultaneously, or B alone. "Connection" describes a connection relationship between related objects. For example, A and B are connected, which can indicate a direct connection between A and B, or an indirect connection between A and B through other devices / units / modules. "Multiple" refers to two or more. Furthermore, to facilitate a clear description of the technical solutions of the embodiments of this application, the terms "first," "second," etc., are used to distinguish identical or similar items with substantially the same function and effect. Those skilled in the art will understand that the terms "first," "second," etc., do not limit the quantity or execution order, and that "first," "second," etc., do not necessarily imply differences.
[0028] Furthermore, the same reference numerals in the figures denote the same or similar structures, thus repeated descriptions of them will be omitted. That is, the various parts in this specification are described using a combination of parallel and progressive methods, with each part focusing on its differences from the others. Similar or identical parts can be referred to interchangeably. Terms expressing position and direction described in this application are illustrative based on the accompanying drawings, but changes can be made as needed, and all such changes are included within the scope of protection of this application. The accompanying drawings in this application are for illustrating relative positional relationships only and do not represent actual scale.
[0029] This application describes many specific details of the invention, such as the specific structure, dimensions, connection relationships, and techniques of the modules, in order to provide a clearer understanding of the invention. However, as those skilled in the art will understand, the invention may be implemented without following these specific details.
[0030] This invention can be presented in various forms, some of which will be described below.
[0031] Figure 2 A schematic diagram of an LED display system according to a first embodiment of the present invention is shown. The LED display system includes a transmitting card 100, a receiving card 200, and multiple display modules 300 arranged in an array. The receiving card 200 includes multiple first conversion modules 210. The number of the first conversion modules 210 is, for example, not less than the number of columns of the multiple display modules 300. Each first conversion module 210 corresponds to a column of display modules 300. The display modules 300 in the same column are connected sequentially to form a cascaded display module to display the image of that column.
[0032] Specifically, in this first embodiment, the LED display system includes six display modules 300, which are arranged in a 2*3 array, i.e., three columns and two rows. The receiving card 200 includes, for example, four first conversion modules 210, with the three adjacent first conversion modules 210 on the left side connected to the display modules 300 in the corresponding columns. All six display modules 300 adopt the same design. Taking the display module 300 in the upper left position as an example, this display module 300 includes: a display panel (not shown in the figure), a second conversion module 310, a driver chip 320, a scan drive circuit 330, and a third conversion module 340. The port Rx+ of the second conversion module 310 is connected to the port Tx+ of the first conversion module 210 of the receiver card 200, and the port Rx- of the second conversion module 310 is connected to the port Tx- of the first conversion module 210 of the receiver card 200. Capacitors C1 and C2 are also provided between the corresponding ports of the second conversion module 310 and the first conversion module 210. Of course, capacitors C1 and C2 can be placed on the connecting line or within either the first conversion module 210 or the second conversion module 310. The second conversion module 310 provides data signals and scan signals to the driver chip 320 and the scan drive circuit 330 within its own display module 300. The scan drive circuit 330, for example, drives the corresponding horizontal output transistor according to the scan signal. The driver chip 320 then transmits the corresponding data signal to the third conversion module 340, and the second conversion module 310 also provides the scan signal to the third conversion module 340. The third conversion module 340 integrates the data signal and the scan signal and transmits them through its ports Tx+ and Tx- to the display module 300 cascaded with it in the same column. The ports Rx+ and Rx- of the second conversion module 310 of the subsequent display module 300 are respectively connected to the ports Tx+ and Tx- of the third conversion module 340, and their connection lines are respectively equipped with capacitors C1 and C2. The second conversion module 310 of the subsequent display module then generates corresponding data signals and scan signals based on the received data and provides them to the driver chip 320 and the scan drive circuit 330 in the display module 300, thereby performing image display.
[0033] Furthermore, each display module 300 includes a second conversion module 310 with an interface E1 and a third conversion module 340 with an interface E2. The second conversion module 310 can provide a vertical synchronization signal (VSYNC) to the third conversion module 340's interface E2 via interface E1. The third conversion module 340 can then transmit this vertical synchronization signal to the next display module 300, thereby achieving vertical synchronization of the screen display of the display modules in that column. Alternatively, in some examples, the third conversion module 340 can bypass the driver chip 320 and obtain the data signal directly through interface E2. That is, the second conversion module 310 and the third conversion module 340 are also configured so that when the driver chip 320 fails, the third conversion module 340 directly obtains the data signal through the vertical synchronization signal channel and continues to output it to the next stage. The failure of the driver chip 320 does not affect the data transmission and screen display of the subsequent display modules cascaded with it.
[0034] Figure 3 A schematic diagram of an LED display system according to a second embodiment of the present invention is shown. This second embodiment is similar to the first embodiment, except that it is horizontally expanded by adding a column of display modules 300, forming a 2*4 array arrangement. Correspondingly, the receiving card 200 divides the received raw display control data into four columns and provides them to the corresponding first conversion modules 210. Alternatively, it can be vertically expanded by adding a display module below the furthest display module in the column-cascaded arrangement, and then cascading the new display module to it. Specifically, when the load changes, the receiving card 200 polls the display modules 300 according to the connection status to obtain the number of display modules 300 and their array arrangement, thereby adjusting its division and conversion of the raw display control data to adapt the display image to the changed display module array.
[0035] Specifically, the receiver card 200 also includes, for example, a control module (not shown in the figure). The control module is connected to each of the first conversion modules 210. After power-on, the control module sequentially (e.g., from left to right) performs current detection or voltage sampling on each of the first conversion modules 210 (polling to obtain new module quantity and arrangement information). The operating current or voltage of each first conversion module 210 has a certain correspondence with the number of display modules 300 it supports. The control module can determine the number of first conversion modules 210 supported by the first conversion module 210 based on the results of current detection or voltage sampling. The number of display modules 300 loaded can be obtained by performing corresponding current detection or voltage sampling on each first conversion module 210. This allows us to obtain the number of display modules 300 loaded by each first conversion module 210 and the total number of display modules 300, thereby obtaining the array arrangement pattern of the display modules 300. For example, the control module has pre-stored corresponding parameters for various arrangement patterns. The control module can adjust the arrangement pattern of the display modules 300 based on the pre-stored parameter settings, so that the segmentation and conversion of the original display control data are adapted to the current arrangement pattern of the display modules 300.
[0036] Furthermore, in some embodiments, the third conversion module 340 in the display module 300 may, for example, be the same conversion module as the first conversion module 210 in the receiver card 200.
[0037] Figure 4 A schematic flowchart illustrating the signal transmission method of an LED display system according to an embodiment of the present invention is shown. (Refer to...) Figure 2 The LED display system shown includes the following steps in its signal transmission method:
[0038] In step S10, the sending card outputs the original display control signal to the receiving card; specifically, the sending card 100 sends the original display control signal required for the display to the receiving card 200.
[0039] In step S20, the receiving card divides and converts the original display control signal into column display control signals; specifically, the receiving card 200 divides and converts the original display control signal into multiple column display control signals corresponding to the number of columns of the display module 300 according to the number of columns of the display module 300, and provides the column display signals to the first conversion module 210 of the corresponding column.
[0040] In step S30, the receiving card converts the column display control signal into a low-voltage differential data signal and provides it to the first display module of the corresponding column. Specifically, the first conversion module 210 in the receiving card 200 converts the column display control signal into a low-voltage differential data signal (LVDS). The receiving card 200 provides the low-voltage differential data signal to the display module 300 directly connected to it through a connecting cable. The display module 300 directly connected to the receiving card 200 is the first display module of the corresponding column.
[0041] In step S40, the display module converts the low-voltage differential data signal and drives the display module to display the image according to the corresponding data. Specifically, the second conversion module 310 in the display module 300 converts the low-voltage differential data signal into a data signal and a scan signal. The data signal is, for example, a TTL (Transistor-Transistor Logic) signal, which includes display data, clock, latch and other control signals. The scan signal is, for example, a row selection signal in dynamic scanning, which is used to specify the currently lit row to realize time-sharing driving of multiple rows of LEDs.
[0042] In step S50, the display module restores the corresponding data to a low-voltage differential data signal and provides it to the subsequent display module. Specifically, the driver chip 320 then transmits the data signal to the third conversion module, and the second conversion module 310 also transmits the scan signal to the third conversion module 340. The third conversion module 340 restores the corresponding data to a low-voltage differential data signal and provides it to the second conversion module 310 of the subsequent display module 300.
[0043] Returning to step S40, the subsequent display module 300 executes steps S40 and S50 again until all display modules in the column have obtained the required data for screen display.
[0044] Furthermore, a step S41 can be set between steps S40 and S50. In step S41, it is determined whether the display module is the last (farthest) module in the column. Specifically, the data can be parsed by the second conversion module 310 in the display module 300. Based on whether the corresponding screen is the last display screen in the column, it is determined whether the display module 300 is the last module in the column. If so, the second conversion module 310 ends the data transmission to the third conversion module 340, and the third conversion module 340 can also temporarily refrain from signal conversion, thereby saving power consumption.
[0045] Of course, step S41 can also be omitted, so that all display modules 300 in the column can obtain the column display control signal through cascading to display the corresponding screen, which can also achieve the required display function.
[0046] The LED display system, display module, and signal transmission method provided in this application are designed to allow the receiving card to output in columns. Display modules in the same column only need to be cascaded one-to-one, eliminating the need to connect display modules at specific positions to their corresponding interfaces. Workers can place modules arbitrarily from left to right and from top to bottom to complete the cascading between adjacent modules in the same column, significantly reducing construction difficulty and labor costs. Furthermore, this LED display system can automatically identify the topology and segment the screen after the module array is changed horizontally or vertically, without requiring manual reconfiguration, achieving "plug and play". The second and third conversion modules within the display module are also connected for data transmission, thereby achieving vertical synchronization. Even if the driver chip of this display module fails, it does not affect the transmission of signals to subsequent display modules, facilitating troubleshooting and maintenance. The LED display system provided by this invention greatly reduces the complexity of LED display screen construction, making LED displays suitable for flexible rental and other application scenarios.
[0047] As described above, these embodiments of the present invention do not exhaustively describe all details, nor do they limit the invention to specific embodiments. Clearly, many modifications and variations can be made based on the above description. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to effectively utilize the invention and its modifications. The scope of protection of this invention should be determined by the scope defined in the claims of this invention.
Claims
1. An LED display system, characterized in that, include: Send card; A receiving card is connected to the sending card, and the receiving card is provided with a first conversion module corresponding to the number of columns of the display module; Multiple display modules are arranged in an array, with display modules in the same column cascaded sequentially, and each column of display modules is connected to a first conversion module in the receiving card.
2. The display system according to claim 1, characterized in that, Each of the display modules includes: The second conversion module is used to convert column display control signals from the first conversion module or the front-end display module into data signals and scan signals. The driver chip receives the data signal, provides the data signal to the display panel of the display module at this level, and transmits the data signal to the third conversion module; The scanning drive circuit receives the scanning signal and provides the scanning signal to the display panel of the display module at this level; The third conversion module restores the data signal and the scanning signal into a column display control signal and outputs it to the subsequent display module.
3. The display system according to claim 2, characterized in that, The column display control signal between the receiving card and the display module, as well as between the display modules cascaded in the same column, is transmitted in the form of a low-voltage differential data signal.
4. The display system according to claim 3, characterized in that, The first conversion module and the second conversion module, as well as the adjacent cascaded third conversion module and the second conversion module, are connected by differential pairs, and the differential pairs are equipped with DC blocking capacitors.
5. The display system according to claim 2, characterized in that, The data signal is a transistor-to-transistor logic signal, including display data and at least one of a clock signal and a latch signal, and the scan signal includes a row selection signal.
6. The display system according to claim 2, characterized in that, The structure of the third conversion module is the same as that of the first conversion module.
7. The display system according to claim 2, characterized in that, A synchronization signal channel is provided between the second conversion module and the third conversion module to transmit the vertical synchronization signal and pass the vertical synchronization signal to the subsequent display module step by step.
8. The display system according to claim 2, characterized in that, The receiving card is configured to obtain new module quantity and arrangement information by polling after the display module array undergoes horizontal and / or vertical expansion, and adjust the segmentation method of the original display control signal accordingly.
9. An LED display module for use in the LED display system as described in any one of claims 1 to 8, characterized in that, The display module includes: The second conversion module is used to convert column display control signals from the first conversion module or the front-end display module into data signals and scan signals. The driver chip receives the data signal, provides the data signal to the display panel of the display module at this level, and transmits the data signal to the third conversion module; The scanning drive circuit receives the scanning signal and provides the scanning signal to the display panel of the display module at this level; The third conversion module restores the data signal and the scanning signal into a column display control signal and outputs it to the subsequent display module.
10. The display module according to claim 9, characterized in that, The second conversion module and the third conversion module are further configured such that, when the driver chip fails, the third conversion module directly obtains data signals from the second conversion module via the vertical synchronization signal channel and continues to output them to the next stage.
11. A signal transmission method for an LED display system, characterized in that, include: The sending card outputs the original display control signal to the receiving card; The receiving card divides the original display control signal by column to form corresponding column display control signals; The receiving card converts the column display control signal into a low-voltage differential data signal and provides it to the first display module of the corresponding column; The display module converts the low-voltage differential data signal and drives the display module to display the image based on the corresponding data. The display module restores the corresponding data as a low-voltage differential data signal and provides it to the subsequent display modules until the last display module of the column completes the display.
12. The method according to claim 11, characterized in that, After detecting a horizontal and / or vertical expansion of the display module array, the receiving card automatically polls and updates the number and arrangement of modules, and adjusts the segmentation strategy accordingly.
13. The method according to claim 11, characterized in that, When the display module resolves that the current display screen is the end screen of the current column, it stops outputting data to the next level in order to save power consumption.