Touch control method and device for LED spliced screen and medium

Abstract

The invention discloses a touch control method and device for an LED spliced screen and a medium, belongs to the technical field of LED spliced screens, and is used for solving the technical problem that an existing LED spliced screen is inaccurate in touch control. The method comprises the steps that a matrix function is created according to the splicing size of the LED splicing screen and the arrangement mode of LED modules; when the touch operation exists, receiving a touch signal and a touch position coordinate sent by a touch unit of the LED module; calling the matrix function according to the touch signal to determine a specific coordinate range corresponding to the LED module; and determining a final touch coordinate according to the touch position coordinate and the specific coordinate range. According to the method, accurate touch control of the LED spliced screen is achieved, the operability and user experience of the LED spliced screen are improved on the premise that the product cost is not greatly increased, and the method can be widely applied to equipment such as LED large screens and all-in-one machines.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of LED splicing screens, and in particular to a touch method for an LED splicing screen, a device, and a medium. BACKGROUND

[0002] With the rapid development of LED display technology, the dot pitch is gradually reduced, such as from P1.25 to P0.9, and then to P0.7. LED display products gradually penetrate into indoor applications. The improvement of picture clarity provides a basis for interaction with users. In the era of "5G+8K", ultra-high-definition video display and ultra-high-speed signal transmission put forward higher requirements for the touch performance of display products. Various application fields hope that the LED splicing screen can have a touch function, such as being used as an interactive whiteboard in a conference scenario to realize direct writing and marking and enhance the interactivity of the conference; being used as an interactive teaching tool in the education field to display three-dimensional models, dynamic images, and other content through touch operation and improve the teaching effect and learning interest; and in the fields of advertising media and exhibition display, allowing the audience to interact with the screen through touch to improve the display effect and audience participation.

[0003] At present, all LED splicing screen products with touch function on the market adopt infrared touch technology. This technology needs to add a touch frame to the outer layer of the LED screen. Through the infrared emission and receiving sensing elements installed on the touch frame, an infrared detection network is formed on the surface of the screen. When the object being touched changes the infrared rays on the touch point, the positioning of the touch and subsequent operation are realized.

[0004] However, since there is a certain spacing between the infrared beams, the touch precision is relatively low. For scenes that require precise operation, such as fine drawing and handwriting input, false touch or inaccurate operation may easily occur, which cannot meet the needs of users. Secondly, the infrared touch technology is easily affected by environmental light and infrared. In the environment of direct sunlight or strong indoor light source, the infrared sensor may be disturbed, resulting in inaccurate or even unrecognizable touch recognition. In addition, if there are other infrared devices around, signal interference may occur, affecting the touch effect. Furthermore, the use of infrared touch technology requires the installation of infrared emission and receiving devices, and the frame of the LED screen needs to be designed to be wider and thicker, which seriously affects the overall aesthetics and display effect of the screen. Especially in some application scenarios that require narrow frames and ultra-thin designs. At the same time, the infrared emission and receiving elements of the infrared touch technology are installed on the screen frame, which is easily damaged by physical impact, scratching, and the like. Once these elements are damaged, the touch function may be partially or completely disabled, which requires timely repair or replacement, increasing the use and maintenance costs. SUMMARY

[0005] The present application provides a touch method for an LED splicing screen, a device, and a medium, which are used to solve at least one of the above technical problems.

[0006] The application adopts the following technical solutions:

[0007] In a first aspect, the application provides a touch method for an LED splicing screen, which comprises: creating a matrix function according to the splicing size of the LED splicing screen and the arrangement mode of the LED module; receiving a touch signal and a touch position coordinate sent by a touch unit of the LED module when there is a touch operation; calling the matrix function according to the touch signal to determine a specific coordinate range corresponding to the LED module; and determining a final touch coordinate through the touch position coordinate and the specific coordinate range.

[0008] In a possible implementation manner of the application, before the matrix function is created according to the splicing size of the LED splicing screen and the arrangement mode of the LED module, the method further comprises: determining the number of LED modules used by the LED splicing screen based on the splicing size of the LED splicing screen; encoding the LED modules based on the number of LED modules, the encoding being unique to the LED modules and the encoding being stored; and creating a matrix function F(X, Y) according to the arrangement mode of the LED modules in the LED splicing screen, wherein X is the number of rows of the LED modules in the LED splicing screen, Y is the number of columns of the LED modules in the LED splicing screen, and F(X, Y) is a coordinate range corresponding to the LED modules in the LED splicing screen; wherein the coordinate range is a coordinate range in an LED splicing screen coordinate system constructed with the lower boundary of the LED splicing screen as the horizontal axis and the left boundary as the vertical axis.

[0009] In a possible implementation manner of the application, when there is a touch operation, the touch unit of the LED module first sends a touch signal and then sends a touch position coordinate (x, y), wherein x is the horizontal coordinate of the touch position in the LED module coordinate system, y is the vertical coordinate of the touch position in the LED module coordinate system, and the LED module coordinate system is a coordinate system constructed with the lower boundary of the LED module as the horizontal axis and the left boundary as the vertical axis.

[0010] In a possible implementation manner of the application, the touch position coordinate is an average coordinate obtained by continuously collecting position coordinates N times by the touch unit of the LED module, wherein N≥3.

[0011] In a possible implementation manner of the application, calling the matrix function according to the touch signal comprises: obtaining a unique code corresponding to the LED module in which the touch unit sending the touch signal is located; determining the position of the LED module in the LED splicing screen according to the unique code, and bringing the position into the matrix function to determine the specific coordinate range corresponding to the LED module.

[0012] In a possible implementation manner of the present application, the final touch coordinate is determined through the touch position coordinate and the specific coordinate range, including: determining a specific coordinate corresponding to the touch position coordinate in the specific coordinate range; and determining the specific coordinate as the final touch coordinate.

[0013] In a possible implementation manner of the present application, the method further includes: selecting a center point of each LED module as a fixed reference point in the LED splicing screen to obtain a fixed coordinate; performing a touch operation on the fixed reference point; calculating a touch coordinate corresponding to the touch operation; comparing the touch coordinate with the fixed coordinate; when the two are inconsistent, constructing a coordinate correction model, and solving model parameters of the coordinate correction model by using a least square method.

[0014] In a possible implementation manner of the present application, after the final touch coordinate is determined through the touch position coordinate and the specific coordinate range, the method further includes: inputting the final touch coordinate into the coordinate correction model; and performing a touch operation response according to a touch coordinate output by the coordinate correction model.

[0015] In a second aspect, the present application further provides a touch device for an LED splicing screen, including: at least one processor; and a memory in communication connection with the at least one processor; wherein the memory stores instructions capable of being executed by the at least one processor, so as to enable the at least one processor to perform: creating a matrix function according to a splicing size of the LED splicing screen and an arrangement manner of an LED module; when there is a touch operation, receiving a touch signal and a touch position coordinate sent by a touch unit of the LED module; calling the matrix function according to the touch signal, so as to determine a specific coordinate range corresponding to the LED module; and determining a final touch coordinate through the touch position coordinate and the specific coordinate range.

[0016] In a third aspect, the present application further provides a non-volatile computer storage medium, which stores computer executable instructions, the computer executable instructions being configured to perform: creating a matrix function according to a splicing size of the LED splicing screen and an arrangement manner of an LED module; when there is a touch operation, receiving a touch signal and a touch position coordinate sent by a touch unit of the LED module; calling the matrix function according to the touch signal, so as to determine a specific coordinate range corresponding to the LED module; and determining a final touch coordinate through the touch position coordinate and the specific coordinate range.

[0017] The touch method, device and medium for the LED splicing screen provided by the present application have the following advantages

[0018] Advantages:

[0019] The touch method for the LED splicing screen provided in the application makes the touch positioning more accurate, and the operability and reliability are higher. In addition, no additional components such as infrared detection frames are needed outside the LED screen body, so that the product design is lighter and thinner, the structure is more beautiful, and the cost is more optimal. At the same time, the scheme can be integrated into various point spacing LED splicing screens, all-in-one machines and other equipment, and has good popularization value. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments described in the application, and those skilled in the art can obtain other drawings according to these drawings without creative labor. In the drawings:

[0021] Figure 1 A flow chart of a touch method for an LED splicing screen is provided in the application;

[0022] Figure 2 A structural schematic diagram of a touch device for an LED splicing screen is provided in the application;

[0023] Figure 3 An overall touch system architecture diagram of an LED splicing screen is provided in the embodiment of the application. DETAILED DESCRIPTION

[0024] In order to make those skilled in the art better understand the technical solutions in the application, the technical solutions in the application will be clearly and completely described in the following with reference to the drawings in the application. Obviously, the described embodiments are only some of the embodiments of the application, not all. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative labor should be within the scope of protection of the present application.

[0025] The method in the application will be described in detail below with reference to the drawings.

[0026] Figure 1 A flow chart of a touch method for an LED splicing screen is provided in the application, as shown in Figure 1 The touch method in the application at least includes the following execution steps:

[0027] Step 101, creating a matrix function according to the splicing size of the LED splicing screen and the arrangement mode of the LED module.

[0028] The LED splicing screen is spliced by LED modules. For example, 10*10 LED modules are spliced into one LED splicing screen, and the splicing size of the LED splicing screen is 10*10, and the number of LED modules used is 100.

[0029] Further, based on the number of LED modules used by one LED splicing screen, the LED modules are coded, so that each LED module is uniquely corresponding to its code. Of course, after coding, a unique identity ID can also be generated for each LED module. The code or identity ID is stored.

[0030] According to the arrangement mode of each LED module in the LED splicing screen, a matrix function F(X, Y) is created, wherein X is the number of rows of LED modules in the LED splicing screen, Y is the number of columns of LED modules in the LED splicing screen, and F(X, Y) is the corresponding coordinate range of the LED module in the LED splicing screen. It should be noted that the coordinate range refers to the corresponding coordinate range in the LED splicing screen coordinate system constructed with the lower boundary of the LED splicing screen as the horizontal axis and the left boundary as the vertical axis. For example, taking a 10*10 LED splicing screen as an example, F(1, 1) refers to the corresponding coordinate range of the LED module in the first row and the first column in the LED splicing screen coordinate system.

[0031] Step 102, when there is a touch operation, receiving the touch signal and touch position coordinates sent by the touch unit of the LED module.

[0032] As can be seen by those skilled in the art, each LED module has a touch unit integrated therein. The touch unit of the LED module is composed of a sensing unit (a magnetic sensing coil array integrated in the PCB stack), a signal processing circuit (filtering + amplification), an ADC conversion unit (analog-to-digital conversion), a control unit (using a GD32XX platform MCU module), a communication unit (using an RS485 bus protocol), and a storage unit (SPIFLASH).

[0033] When the LED splicing screen is powered on, the touch unit integrated in each LED module can continuously scan, and when a touch operation is scanned, for example, the user clicks the LED splicing screen using an electromagnetic pen, the touch unit in the LED module first sends a touch signal to the host system to inform the host system that there is a touch operation. Preferably, the touch signal can carry the unique code or unique ID generated for the current LED module in the foregoing step. Then, by calling the algorithm integrated in the FLASH, the touch position coordinates (x, y) are calculated. The touch position coordinates (x, y) are based on each LED module, so that x is the horizontal coordinate of the touch position in the LED module coordinate system, and y is the vertical coordinate of the touch position in the LED module coordinate system. The LED module coordinate system is a coordinate system constructed with the lower boundary of the LED module as the horizontal axis and the left boundary as the vertical axis.

[0034] In a possible implementation of the present application, in order to improve the accuracy of the touch position coordinates sent by the touch unit of the LED module to the host system, and facilitate accurate touch, the touch unit sends the position coordinates, which are preferably the coordinates obtained by calculating the average of N times of continuously collected position coordinates, where N≥3.

[0035] It should be further noted that the process of calculating the touch position coordinates by using the preset algorithm can be realized by existing algorithms or technologies, and the present application does not make any further description here, as long as the touch position of the touch device such as an electromagnetic pen on the LED module can be obtained.

[0036] Step 103, calling a matrix function according to the touch signal to determine the specific coordinate range corresponding to the LED module.

[0037] After the host system receives the touch signal, the code of the LED module carried in the touch signal is used to determine the LED module, or the touch unit sending the touch signal is used to determine the LED module. The code of the LED module is read from the cache, and the position of the LED module in the LED splicing screen is determined according to the code, such as being located in the first row and the first column. Then, the matrix function constructed in the foregoing is called, and the code or position of the LED module is brought into the matrix function to obtain the specific coordinate range corresponding to the current LED module.

[0038] Step 104, determining the final touch coordinates through the touch position coordinates and the specific coordinate range.

[0039] After obtaining the touch position coordinate and the specific coordinate range, the touch position coordinate is converted to the specific left range, or the specific coordinate corresponding to the touch position coordinate is calculated in the specific coordinate range. For example, the LED splicing screen includes one row of five LED modules, and each LED module includes one row of 20 sensing arrays; it is determined that the touch position coordinate is (1, 1) in the coordinate system of the second LED module, and the specific coordinate range of the first row and the second column of the LED module is (1, 21-40), and the calculated specific coordinate is (1, 21).

[0040] In a possible implementation of the present application, in order to further ensure the positioning accuracy of the touch position of the LED splicing screen, a coordinate correction model can also be constructed, and the touch position coordinate calculated in the foregoing is corrected by using the coordinate correction model to obtain a touch position coordinate with better accuracy. Specifically, the center point of each LED module can be taken as a fixed reference point to obtain a fixed coordinate, then each fixed reference point is touched by using a touch device such as an electromagnetic pen, and the corresponding touch coordinate is calculated by using the foregoing scheme, and the touch coordinate and the fixed coordinate are compared and calculated, and the parameters of the coordinate correction model are solved by using the least square method. Then, each time the touch position coordinate is calculated, the calculated coordinate can be input into the coordinate correction model for correction.

[0041] Based on the same inventive concept, the present application also provides a touch device for an LED splicing screen, as shown in the structural schematic diagram thereof. Figure 2

[0042] Figure 2 A structural schematic diagram of a touch device for an LED splicing screen provided by the present application is shown in FIG. 2. As shown in FIG. 2, the touch device 200 for an LED splicing screen in the present application specifically includes at least one processor 201, and a memory 203 in communication connection (through a bus 202) with the at least one processor 201; wherein the memory 203 stores instructions executable by the at least one processor 201, so that the at least one processor 201 can execute a touch method for an LED splicing screen as described in any of the above embodiments. Figure 2

[0043] In a possible implementation of the present application, the foregoing processor is configured to create a matrix function according to the splicing size of the LED splicing screen and the arrangement mode of the LED module; when there is a touch operation, receive a touch signal and a touch position coordinate sent by a touch unit of the LED module; according to the touch signal, call the matrix function to determine a specific coordinate range corresponding to the LED module; and determine a final touch coordinate through the touch position coordinate and the specific coordinate range.

[0044] ​​In addition, the application further provides a nonvolatile computer storage medium, which stores computer executable instructions configured to execute the touch method for the LED splicing screen as described in any of the above embodiments.

[0045] In a possible implementation of the application, the computer executable instructions are configured to perform the following: creating a matrix function according to the splicing size of the LED splicing screen and the arrangement mode of the LED module; receiving a touch signal and a touch position coordinate sent by a touch unit of the LED module when there is a touch operation; calling the matrix function according to the touch signal to determine a specific coordinate range corresponding to the LED module; and determining a final touch coordinate through the touch position coordinate and the specific coordinate range.

[0046] Figure 3 An overall touch system architecture diagram of the LED splicing screen provided by the embodiment of the application is shown in FIG. 1. Figure 3 As shown in FIG. 1, the LED splicing screen is spliced by a plurality of LED modules, each of which needs to integrate a touch unit. The LED splicing screen product of the application is composed of a main control system, a communication unit, a display unit and a storage unit. The main control system adopts an ARM architecture platform, the communication unit adopts an RS485 bus protocol, and the storage unit adopts an eMMC chip. In addition, the main control system also provides a standard API interface protocol, supports visual configuration and adjustment of the touch system.

[0047] The specific implementation principle / process is as follows:

[0048] 1) Touch unit ID assignment: according to the number of LED modules used in the LED splicing screen, each LED module integrated with a touch unit is numbered and given a unique ID value, and the ID value is burned in the storage FLASH;

[0049] 2) Matrix function creation: according to the structure size after splicing of the LED splicing screen and the arrangement mode of the LED module, a distributed touch unit matrix function F(X, Y) of the system layer is created, where X represents the number of rows and Y represents the number of columns, and the above information is stored in the eMMC storage unit;

[0050] 3) Touch positioning and calculation: the touch unit integrated in the LED module starts a continuous scanning mode after power-on, and when a touch operation is recognized, the MCU control system in the LED module sends a touch operation instruction / touch signal to the main control system, and then calculates the coordinate value (x, y) based on a single LED module according to a preset algorithm, and sends the calculated coordinate value (x, y) to the main control system through the RS485 bus;

[0051] 4) Signal receiving and calculating: after the master control system receives the touch signal sent by the LED touch unit (integrated in the LED module) through the RS485 bus, the ID value corresponding to the LED module is read first, and then the ID value is substituted into the distributed touch unit matrix function F(X, Y) created in the first step to determine the coordinate range corresponding to the LED module. The coordinate value (x, y) obtained in the third step is read and the final touch coordinate is calculated;

[0052] 5) Data calibration and optimization: considering the assembly accuracy of the LED spliced screen, the center point of each LED module is selected as the fixed reference point after assembly. The electromagnetic pen is sequentially touched on these reference points, and the touch coordinate value is calculated through the fourth step. The calculated touch coordinate value is compared with the fixed coordinate, and the specific parameters of the coordinate correction model are solved by the least square method. For the subsequent detected touch coordinates, the model is directly substituted for correction, which can further ensure the accurate touch of the LED spliced screen.

[0053] The embodiments in the present application are described in a progressive manner, and the same and similar parts between the embodiments can be referred to each other. Each embodiment focuses on the difference from other embodiments. Especially, the device embodiment is described simply because it is basically similar to the method embodiment, and the related parts can be referred to the part of the method embodiment.

[0054] The device and the method provided by the present application are one-to-one correspondence, so the device also has the similar beneficial technical effects as the method. Since the beneficial technical effects of the method have been described in detail above, the beneficial technical effects of the device will not be described here.

[0055] Those skilled in the art should understand that the embodiments of the present application can be provided as a method, device, system, or computer program product. Therefore, the present application can take the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware aspects. Moreover, the present application can take the form of a computer program product implemented on one or more computer usable storage media containing computer usable program code.

[0056] It should also be noted that the term "comprising" or "including" or any other variation thereof is intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such a process, method, article or device. Without more limitations, the element defined by the statement "including a" does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0057] The above merely provides an example of the present application, but is not intended to limit the present application. The present application can have various modifications and changes for those skilled in the art. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A touch control method for LED splicing screen, characterized in that: The method comprises: Create a matrix function based on the splicing size of the LED splicing screen and the arrangement of the LED modules; When a touch operation occurs, the touch signal and touch position coordinates sent by the touch unit of the LED module are received; Calling the matrix function according to the touch signal to determine the specific coordinate range corresponding to the LED module; Final touch coordinates are determined using the touch position coordinates and the specific coordinate range.

2. A touch control method for an LED splicing screen according to claim 1, characterized in that: Before creating a matrix function according to the splicing size of the LED splicing screen and the arrangement of the LED modules, the method further includes: Determining the number of LED modules used in the LED splicing screen based on the splicing size of the LED splicing screen; Encoding the LED modules based on the number of LED modules, wherein the codes uniquely correspond to the LED modules, and storing the codes; According to the arrangement of the LED modules in the LED splicing screen, a matrix function F(X, Y) is created, wherein X is the number of rows of the LED modules in the LED splicing screen, Y is the number of columns of the LED modules in the LED splicing screen, and F(X, Y) is the coordinate range corresponding to the LED modules in the LED splicing screen; wherein the coordinate range is the coordinate range in the LED splicing screen coordinate system constructed with the lower boundary of the LED splicing screen as the horizontal axis and the left boundary as the vertical axis.

3. A touch control method for an LED splicing screen according to claim 1, characterized in that: When a touch operation occurs, the touch unit of the LED module first sends a touch signal and then sends the touch position coordinates (x, y), where x is the horizontal coordinate of the touch position in the LED module coordinate system, and y is the vertical coordinate of the touch position in the LED module coordinate system. The LED module coordinate system is a coordinate system constructed with the lower boundary of the LED module as the horizontal axis and the left boundary as the vertical axis.

4. A touch control method for an LED splicing screen according to claim 3, characterized in that: The touch position coordinates are average coordinates obtained after the touch unit of the LED module continuously collects position coordinates N times, where N≥3.

5. A touch control method for an LED splicing screen according to claim 1, characterized in that: Calling the matrix function according to the touch signal includes: Obtaining a unique code corresponding to the LED module where the touch unit that sends the touch signal is located; The position of the LED module in the LED splicing screen is determined according to the unique code, and the position is substituted into the matrix function to determine the specific coordinate range corresponding to the LED module.

6. A touch control method for an LED splicing screen according to claim 1, characterized in that: Determining final touch coordinates using the touch position coordinates and the specific coordinate range includes: Determining specific coordinates corresponding to the touch position coordinates within the specific coordinate range; The specific coordinates are determined as the final touch coordinates.

7. A touch control method for an LED splicing screen according to claim 1, characterized in that: The method further comprises: Select the center point of each LED module in the LED splicing screen as a fixed reference point to obtain fixed coordinates; Performing a touch operation on the fixed reference point; Calculating the touch coordinates corresponding to the touch operation; Comparing the touch coordinates with the fixed coordinates; When the two are inconsistent, a coordinate correction model is constructed, and the model parameters of the coordinate correction model are solved using the least square method.

8. A touch control method for an LED splicing screen according to claim 7, characterized in that: After determining the final touch coordinates using the touch position coordinates and the specific coordinate range, the method further includes: inputting the final touch coordinates into the coordinate correction model; A touch operation response is performed according to the touch coordinates output by the coordinate correction model.

9. A touch device for an LED splicing screen, characterized in that: The device comprises: at least one processor; and, a memory communicatively connected to the at least one processor; wherein, The memory stores instructions that can be executed by the at least one processor, so that the at least one processor can execute, Create a matrix function based on the splicing size of the LED splicing screen and the arrangement of the LED modules; When a touch operation occurs, the touch signal and touch position coordinates sent by the touch unit of the LED module are received; Calling the matrix function according to the touch signal to determine the specific coordinate range corresponding to the LED module; Final touch coordinates are determined using the touch position coordinates and the specific coordinate range.

10. A non-volatile computer storage medium having computer executable instructions stored thereon, characterized in that: The computer-executable instructions are configured to: Create a matrix function based on the splicing size of the LED splicing screen and the arrangement of the LED modules; When a touch operation occurs, the touch signal and touch position coordinates sent by the touch unit of the LED module are received; Calling the matrix function according to the touch signal to determine the specific coordinate range corresponding to the LED module; Final touch coordinates are determined using the touch position coordinates and the specific coordinate range.

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