LED display touch module, LED touch system and control method

Abstract

The invention provides an LED display touch module, an LED touch system and a control method.The LED display touch module comprises a touch function circuit layer used for generating an electric signal triggered by physical contact through a plurality of touch sensing points arranged at intervals; and the touch control integrated circuit is used for detecting the electric signal and determining coordinate information of a touch point corresponding to the physical contact according to the electric signal. Through the scheme, the LED display touch module can have a touch function, and meanwhile, the ambient light resistance, dust resistance and water vapor resistance of the touch function are improved.

Description

Technical Field

[0001] This application relates to the field of displays, and more particularly to an LED display touch module, an LED touch system, and a control method. Background Technology

[0002] Light-emitting diode (LED) displays feature high brightness, vibrant colors, high luminous efficiency, high contrast, short response time, wide operating temperature range, and low energy consumption. They are widely used in stage display equipment, advertising display equipment, data visualization display equipment, and commercial display equipment.

[0003] However, the single function of LED display can no longer meet the diverse application scenarios, such as conference presentations, education and teaching, and intelligent control. There is an urgent need for a technology that can enable touch functions for LED display modules. Summary of the Invention

[0004] This application provides an LED display touch module, an LED touch system, and a control method, which enables the LED display touch module to have touch functionality.

[0005] According to one aspect of the embodiments of this application, an LED display touch module is provided. The inner layer of the LED display touch module package includes: a touch function circuit layer for generating an electrical signal triggered by physical contact through a plurality of spaced touch sensing points; and a touch control integrated circuit for detecting the electrical signal and determining the coordinate information of the touch point corresponding to the physical contact based on the electrical signal.

[0006] Based on the above solution, the LED display touch module can realize touch functionality based on the touch function circuit layer and the touch control integrated circuit. Specifically, by setting up the touch function circuit layer, the LED display touch module can convert physical contact into electrical signals, and by setting up the touch control integrated circuit, it can determine the coordinate information of the touch point corresponding to the physical contact. Based on this design, when a user performs a touch operation, the LED display touch module can detect the user's touch position in real time, so as to perform corresponding control operations based on the touch position.

[0007] On the other hand, the touch function circuit layer is set in the inner layer of the package, that is, the touch function circuit layer is covered by the surface encapsulation layer, which greatly improves the performance of the LED display touch module against ambient light, dust and moisture, effectively reduces the interference of external factors on the touch function, and ensures that the touch function of the LED display touch module can still accurately recognize physical operations and transmit signals stably in complex environments, bringing users a smooth touch interaction experience.

[0008] In one embodiment of this application, the LED display touch module further includes: an LED display driving circuit layer for driving the LED light-emitting elements to display an image; and an isolation layer disposed between the LED display driving circuit layer and the touch function circuit layer for shielding the magnetic field environment generated by the LED display driving circuit layer from interfering with the touch function circuit layer.

[0009] The LED display driver circuit layer generates a strong magnetic field during operation, which can cause electromagnetic interference to the touch function circuit layer, affecting the sensitivity of the touch function. To address this, an isolation layer is placed between the LED display driver circuit layer and the touch function circuit layer. This reduces the impact of the magnetic field environment of the LED display driver circuit layer on the performance of the touch function circuit layer, thereby improving the sensitivity of the touch function.

[0010] In one embodiment of this application, the isolation layer is made of a conductive material.

[0011] The isolation layer design can reduce electromagnetic interference, but if the magnetic field environment is strong, the performance of the touch function circuit layer may still be affected. In the above solution, the isolation layer uses a conductive material, such as solid copper. Because conductive materials have high conductivity, they have a significant effect on reflecting high-frequency electromagnetic waves, thus improving the anti-electromagnetic interference effect.

[0012] In one embodiment of this application, the isolation layer includes multiple sub-isolation layers.

[0013] While the design of the isolation layer can reduce electromagnetic interference, the performance of the touch circuitry layer may still be affected if the magnetic field environment is strong. In the above solution, the isolation layer is designed as a multi-layer structure to further reduce electromagnetic interference. Understandably, in practical applications, the design of each layer needs to follow the general design specifications of the substrate, thus requiring a specific thickness for each layer. If the isolation layer is only one layer, insufficient thickness may lead to a deterioration in magnetic field isolation, affecting the performance of the touch circuitry layer. In this solution, multiple sub-isolation layers are designed. Even if each sub-isolation layer follows the general design specifications of the substrate, the combined thickness of these multiple sub-isolation layers significantly increases the total thickness of the isolation layer, achieving the goal of improving the magnetic field shielding effect.

[0014] In one embodiment of this application, the distance between adjacent touch sensing points among a plurality of touch sensing points is greater than or equal to a first threshold.

[0015] Touch sensitivity can be affected by various factors, resulting in poor smoothness of touch interaction. The above solution can reduce parasitic capacitance and crosstalk caused by the proximity of touch sensing points, thereby improving the accuracy and sensitivity of touch detection.

[0016] In one embodiment of this application, the distance between the touch sensing point and the ground layer of the LED display touch module is greater than or equal to a second threshold and less than or equal to a third threshold.

[0017] Touch sensitivity can be affected by various factors, leading to poor smoothness in touch interaction. The above solution avoids an excessively large gap between the touch sensor and the ground plane. While a large gap reduces the capacitance of the touch sensor and increases the RC oscillation frequency, thus improving sensitivity, it weakens the constraint on the electromagnetic field and reduces interference resistance. Conversely, this design also avoids an excessively small gap between the touch sensor and the ground plane, which would increase capacitance and decrease sensitivity.

[0018] In one embodiment of this application, the ground plane of the LED display touch module is continuously arranged and connected by multiple vias.

[0019] The touch functionality circuitry layer can be affected by electrical charge interference, impacting touch sensitivity. Therefore, in the above solution, a continuous ground plane for the LED display touch module, connected via multiple points, reduces interference to the touch functionality circuitry layer and improves touch detection accuracy. Specifically, if the ground plane is not continuous or via connections are not used, capacitance will be generated at these locations during operation, storing electrical charges. This can interfere with the electrical signals generated by the touch functionality circuitry layer, thus affecting the touch function. Conversely, a continuous ground plane and multiple via connections suppress electromagnetic coupling, reduce charge generation, and thus minimize interference to the touch functionality circuitry layer.

[0020] In one embodiment of this application, the touch control integrated circuit is arranged adjacent to the touch sensing point.

[0021] Touch response efficiency can be affected by various factors, resulting in poor smoothness of touch interaction. The above solution places the touch control IC close to the touch sensing point, thereby shortening the signal transmission path and improving the touch response rate.

[0022] According to one aspect of the embodiments of this application, an LED touch control system is provided, including an LED display touch module as described in the preceding aspect, a first main control chip connected to the LED display touch module, and a second main control chip. The touch control integrated circuit is further configured to send an interrupt signal to the first main control chip when a change in the detected electrical signal exceeds a fourth threshold; the first main control chip is configured to obtain a first touch feedback signal from the touch control integrated circuit according to the interrupt signal and send the first touch feedback signal to the second main control chip, the first touch feedback signal including the coordinate information of a touch point and the type of physical contact touch event; the second main control chip is configured to convert the coordinate information into screen coordinates according to the coordinate information, the resolution of the LED display screen, and the display area, and send a second touch feedback signal to a terminal device, the second touch feedback signal including the screen coordinates and the touch event type, the screen coordinates indicating the coordinate position of the touch point on the LED display screen, the LED display screen being a screen with display and touch functions composed of multiple LED display touch modules in the LED touch control system; the terminal device is configured to perform corresponding operations according to the touch event type and the screen coordinates.

[0023] Based on the above solution, the position of the touch point on the display screen and the touch type can be fed back to the terminal device, so that the terminal device can perform the corresponding operation according to the received information, thereby realizing the conversion from physical contact to corresponding operation, that is, realizing the touch function of the LED display touch module.

[0024] In one embodiment of this application, the terminal device is further configured to send the generated display signal to the second main control chip after performing the operation; the second main control chip is further configured to send the display signal to the LED display touch module through the first main control chip; the LED display touch module is further configured to drive the LED light-emitting element to display the corresponding image based on the display signal through the LED display driving circuit layer.

[0025] Based on the above solution, the display signal of the newly generated screen after touch can be sent to the LED display touch module so that the LED display touch module can display the newly generated screen to the user.

[0026] According to one aspect of the embodiments of this application, a control method is provided for an LED display touch module of any of the foregoing embodiments. The control includes: after receiving an interrupt signal from a touch control integrated circuit, obtaining a first touch feedback signal from the touch control integrated circuit, wherein the interrupt signal is triggered when the change of an electrical signal exceeds a fourth threshold, and the first touch feedback signal includes coordinate information of a touch point and a touch event type of physical contact; converting the coordinate information into screen coordinates according to the coordinate information, the resolution of the LED display screen and the display area, and sending a second touch feedback signal to a terminal device, wherein the second touch feedback signal includes screen coordinates and a touch event type, and the screen coordinates are used to indicate the coordinate position of the touch point on the LED display screen, wherein the LED display screen is a screen with display and touch functions composed of multiple LED display touch modules in an LED touch system.

[0027] Based on the above solution, the position of the touch point on the display screen and the touch type can be fed back to the terminal device, so that the terminal device can perform the corresponding operation according to the received information, thereby realizing the conversion from physical contact to corresponding operation, that is, realizing the touch function of the LED display touch module.

[0028] In one embodiment of this application, the control method further includes: receiving a display signal from a terminal device, the display signal being generated by the terminal device after performing a corresponding operation based on a second touch feedback signal; and sending the display signal to the LED display touch module.

[0029] Based on the above solution, the display signal of the newly generated screen after touch can be sent to the LED display touch module so that the LED display touch module can display the newly generated screen to the user.

[0030] According to one aspect of the embodiments of this application, an LED display screen is provided, the LED display screen including: a memory and at least one main control chip, the memory storing instructions, the memory and at least one main control chip being interconnected via a circuit; the at least one main control chip calling the instructions in the memory to cause the LED display screen to perform any aspect of the control method described above.

[0031] According to one aspect of the embodiments of this application, a computer-readable storage medium is provided, on which a computer program is stored, which, when executed by a processor, implements any aspect of the control method described above.

[0032] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and do not limit this application. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0034] Figure 1 A schematic diagram is shown illustrating how to implement LED screen touch functionality using infrared technology.

[0035] Figure 2 A schematic diagram of a single-mode, single-sided touch structure is shown.

[0036] Figure 3 A schematic diagram of the double-layer film touch structure is shown;

[0037] Figure 4 This diagram illustrates a structure that combines ITO film touch technology with an LED display panel.

[0038] Figure 5 This diagram illustrates another structural design that combines ITO film touch technology with an LED display panel.

[0039] Figure 6 This illustration shows a structural schematic diagram of an LED display touch module provided in an embodiment of this application;

[0040] Figure 7 A schematic diagram showing the arrangement of multiple light-emitting elements in an LED display touch module is provided.

[0041] Figure 8 A schematic diagram showing the arrangement of multiple touch sensing points and multiple light-emitting elements in an LED display touch module is shown.

[0042] Figure 9 This paper shows a schematic diagram of another LED display touch module provided in an embodiment of this application;

[0043] Figure 10 This paper shows a schematic diagram of the structure of another LED display touch module provided in an embodiment of this application;

[0044] Figure 11 This paper shows a schematic diagram of the structure of another LED display touch module provided in an embodiment of this application;

[0045] Figure 12 This paper shows a schematic diagram of the structure of an LED touch system provided in an embodiment of the present application;

[0046] Figure 13 A schematic diagram of an LED display screen is shown.

[0047] Figure 14 An exemplary flowchart of the control method 100 provided in an embodiment of this application is shown. Detailed Implementation

[0048] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the examples set forth herein; rather, these embodiments are provided to make this application more comprehensive and complete, and to fully convey the concept of the exemplary embodiments to those skilled in the art.

[0049] Furthermore, the described features, structures, or characteristics can be combined in any suitable manner in one or more embodiments. Numerous specific details are provided in the following description to give a thorough understanding of embodiments of this application. However, those skilled in the art will recognize that the technical solutions of this application can be practiced without one or more of the specific details, or other methods, components, apparatuses, steps, etc., can be employed. In other instances, well-known methods, apparatuses, implementations, or operations are not shown or described in detail to avoid obscuring various aspects of this application.

[0050] In the description of the embodiments disclosed in this invention, the term "comprising" and similar terms should be understood as open-ended inclusion, i.e., "including but not limited to". The term "based on" should be understood as "at least partially based on". The term "one embodiment" or "the embodiment" should be understood as "at least one embodiment". The terms "first", "second", etc., may refer to different or the same objects. Other explicit and implicit definitions may also be included below.

[0051] LED display technology, with its advantages of high brightness, high contrast, low energy consumption, and long lifespan, is widely used in stage display equipment, advertising display equipment, data visualization display equipment, and commercial display equipment, occupying an important position in the display field.

[0052] However, with the rapid development of technology and the increasing demand for human-computer interaction, the single function of LED display can no longer meet the diverse application scenarios. For example, LED touch technology is urgently needed in scenarios such as conference presentations, education and teaching, and intelligent control.

[0053] Figure 1 A schematic diagram illustrating touch functionality on an LED screen using infrared technology is shown. Infrared touch technology is a contactless interaction solution that detects touch locations by deploying infrared elements around the LED display panel without altering the physical structure of the LED display panel itself. It is unaffected by the light-emitting characteristics of LEDs and offers high stability and cost-effectiveness.

[0054] like Figure 1 As shown, infrared emitters and receivers are placed around the perimeter of the LED display panel. Specifically, a set of corresponding infrared emitters and receivers is placed in the X direction, and another set in the Y direction. The working principle of this touch technology is to use infrared beams to form an invisible grid on the screen surface (as shown by the dotted lines in the figure), and to locate the touch point based on the occlusion and recognition mechanism of the infrared signal. For example, when an object touches the screen surface, an occlusion area is created on the screen. Within this area, the infrared receiver cannot receive the infrared signal. The (X, Y) coordinate position information of this occlusion area on the screen is transmitted to the terminal device through a communication interface. The terminal device is usually a hardware device with an operating system, such as a computer or an Android processor. After receiving the position information, the terminal device will simulate an operation at the corresponding position of the displayed content. Common operations include the clicking and selection function of a computer mouse; with specific applications, it can also achieve more functions such as whiteboard writing.

[0055] However, the aforementioned touch technologies have limited accuracy, and infrared light is easily blocked and interfered with by factors such as dust and moisture, thus affecting the touch performance. This necessitates regular cleaning and maintenance. In addition, large-size infrared touchscreens are expensive, which also limits their widespread application.

[0056] Figures 2 to 3 This diagram illustrates a method for implementing LED screen touch functionality using an indium tin oxide (ITO) film. ITO film is a transparent conductive material composed of indium oxide (In₂O₃) and tin oxide (SnO₂). The principle involves constructing a capacitive touch sensor using the ITO film. When a human body touches the sensor, the change in coupling capacitance created by the human body's electric field is used to detect the touch position. For example, a matrix electrode distribution (X / Y axis intersection) can be designed, and a main control chip can scan the capacitance changes to achieve multi-touch. Figure 2 A schematic diagram of a single-mode, single-sided touch structure is shown. Figure 3 A schematic diagram of a double-layer film touch structure is shown.

[0057] Figures 4 to 5 A schematic diagram of the structure combining ITO film touch technology with an LED display panel is shown. Figure 4 As shown, the touchpad made of ITO is connected to the control IC through the circuitry on the edge. When a human touches the touchpad, the electrical signal generated by the touchpad is transmitted to the control IC through the circuitry, and the control IC recognizes the touch signal.

[0058] Understandably, LED displays are typically composed of multiple display panels spliced ​​together. However, each LED display panel has wiring along its edges for connecting to the control IC. Since this wiring cannot be bent, noticeable gaps will appear when the LED display panels are spliced ​​together. Figure 5 As shown.

[0059] Figure 6 This application provides a schematic diagram of the structure of an LED display touch module. This LED display touch module implements touch functionality through a touch function circuit layer, solving the problem of LED modules simultaneously possessing display and touch functions. It is understood that the LED display touch module in this application embodiment can be considered as an LED display panel (or LED light panel) with touch functionality. In practical applications, multiple LED display touch modules can be spliced ​​together to form an LED display screen; the specific method is not limited in this application.

[0060] like Figure 6 As shown, the LED display touch module includes a touch function circuit layer. This touch function circuit layer is used to generate electrical signals triggered by physical contact through multiple spaced touch sensing points; that is, the touch function circuit layer converts physical contact into electrical signals, thereby realizing the touch function.

[0061] Understandably, when adding a touch function circuit layer to an LED display touch module, the compatibility between the touch function circuit layer and the original display-related circuits must be considered, and the positions of each component should be arranged reasonably to avoid mutual interference.

[0062] In one possible implementation provided in this application embodiment, the touch function circuit layer uses differential signals for signal transmission, which can reduce signal interference; during wiring design, shielded traces (ground wire wrapping method) are used to avoid vias, thereby controlling impedance matching and reducing reflection.

[0063] It is understood that a touch sensor pad is a physical sensing unit, typically composed of a transparent conductive material (such as an ITO coating). Its function is to sense touch actions, converting physical contact into electrical changes. For example, when a hand touches a touch sensor pad, a coupling capacitor is formed between the touch sensor pad and the hand, causing a change in capacitance. Touch sensor pads can also be called sensing disks, sensor disks, sensors, etc. Touch sensor pads can be oriented, circular, or various other shapes; this application does not limit this. It is understood that the above example uses a capacitive touch sensor pad for illustration, but touch sensor pads can also be made in other forms such as resistors; this application does not limit this either.

[0064] In one implementation, a plurality of touch sensing points are set in an LED display touch module, and the plurality of touch sensing points are arrayed and spaced apart. Figure 8 This diagram illustrates the arrangement of multiple touch sensing points and multiple light-emitting elements in an LED display touch module. The number of touch sensing points is not limited and can be flexibly adjusted according to actual needs.

[0065] In one possible design, touch-sensitive points are formed on the PCB substrate as pads.

[0066] like Figure 6 As shown, in one possible design, the LED display driving circuit layer and the touch function circuit layer are sequentially disposed on one side surface of the substrate.

[0067] like Figure 6 As shown, the LED display touch module is also provided with control lines. In one embodiment provided in this application, the control lines are used to transmit electrical signals.

[0068] like Figure 6 As shown, the LED display touch module is equipped with an integrated circuit (IC), specifically including a display driver IC and a touch control IC. In one embodiment provided in this application, the touch control IC is used to detect the electrical signal triggered by physical contact in the touch function circuit layer, and determine the coordinate information of the touch point corresponding to the physical contact based on the electrical signal. The touch control IC can also be referred to as a touch chip.

[0069] Based on the above solution, the LED display touch module can realize touch functionality based on the touch function circuit layer and the touch control IC. Specifically, by setting up the touch function circuit layer, the LED display touch module can convert physical contact into electrical signals, and by setting up the touch control IC, it can determine the coordinate information of the touch point corresponding to the physical contact. Based on this design, when a user performs a touch operation, the LED display touch module can detect the user's touch position in real time, so as to perform corresponding control operations based on the touch position.

[0070] It is understandable that while the LED display touch module provided in the above solutions can achieve touch functionality, the touch sensing sensitivity may be affected by various factors, resulting in poor smoothness of touch interaction. Therefore, in one possible design provided in this application, the distance between adjacent touch sensing points is greater than or equal to a first threshold, such as 1 mm. This design can reduce parasitic capacitance and crosstalk caused by excessively close touch sensing points, thereby improving the accuracy and sensitivity of touch detection. In another possible design provided in this application, the distance between adjacent touch sensing points is less than or equal to a fifth threshold, such as 3 mm. This design can reduce the problem of decreased sensitivity caused by excessively large spacing between touch sensing points. In yet another possible design provided in this application, the spacing between the touch sensing points and the ground plane of the LED display touch module is greater than or equal to a second threshold (e.g., 0.5 mm) and less than or equal to a third threshold (e.g., 1 mm). The ground plane, also known as the ground layer, mainly functions to achieve anti-interference, signal stability optimization, and parasitic capacitance control through specific geometric layout and electrical connections. This design avoids an excessively large gap between the touch sensor and the ground plane. While a large gap reduces the capacitance of the touch sensor, increases the RC oscillation frequency, and improves sensitivity, it also weakens the constraint on the electromagnetic field and reduces interference immunity. Conversely, an excessively small gap between the touch sensor and the ground plane leads to increased capacitance and decreased sensitivity.

[0071] It is understandable that, when designing the overall layout, the components of the touch function section (touch function circuit layer, touch sensing lamps) should be kept away from the heat-generating components and high-frequency interference sources of the LED display, such as LED driver chips and clock circuits, in order to reduce signal interference and minimize the impact of heat sources on the performance and lifespan of the touch function components.

[0072] like Figure 6 As shown, the LED display touch module also includes a surface encapsulation layer. This encapsulation layer, located outside the LED display touch module, encapsulates the other layers internally, protecting internal components and providing radiation and heat dissipation functions. Commonly used encapsulation materials include epoxy resin, silicone, and plastics. These materials have good insulation and high-temperature resistance, effectively preventing LED chips from being damaged by moisture, oxidation, and heat.

[0073] Based on this solution, the touch function circuit layer is placed in the inner layer of the package. That is, the touch function circuit layer is covered by the surface encapsulation layer, which greatly improves the performance of the LED display touch module in resisting ambient light, dust and moisture. It effectively reduces the interference of external factors on the touch function and ensures that the touch function of the LED display touch module can still accurately recognize physical operations and stably transmit signals in complex environments, bringing users a smooth touch interaction experience.

[0074] like Figure 6 As shown, the LED display touch module includes a substrate, which serves as the supporting structure for the LED display touch module, connecting and fixing internal components and circuits, and providing support, electrical interconnection, and an optical transmission basis. Specifically, the substrate involved in this application embodiment can be a PCB substrate. It is understood that although the LED display touch module provided in the above solution can achieve touch functionality, the touch response efficiency may be affected by various factors, resulting in poor smoothness of touch interaction. Therefore, in one possible implementation provided in this application, the touch control IC is arranged adjacent to the touch sensing point, that is, the touch control IC is placed close to the touch sensing point to shorten the signal transmission path and improve the touch response rate.

[0075] In one possible implementation provided in the application, the electrical connection between the touch control IC and the touch sensing point is a straight-line connection. The trace length is controlled within a preset range, meaning the trace is as short and straight as possible to ensure reliable electrical connection and reduce signal attenuation and interference. Furthermore, analog and digital circuits, as well as high-speed and low-speed signals, are placed on different layers or in different areas to avoid cross-wiring.

[0076] In one possible implementation provided in this application, the data transmission interface between the touch control IC and the touch sensing point is selected according to business requirements, and wiring is performed according to the corresponding interface specifications. The data transmission interface may be, for example, a serial peripheral interface (SPI), an inter-integrated circuit (I2C), etc.

[0077] In one possible design provided in this application, test points are set on the substrate to detect the working status of the touch function, so as to promptly detect and handle any abnormalities in the touch function. For example, a tester can touch the test points and check whether the LED display touch module has performed the corresponding operation to verify whether the touch function is abnormal.

[0078] In one possible embodiment, the layers other than the substrate can be separated by a prepreg (PP) as an interlayer medium.

[0079] like Figure 6 As shown, the LED display touch module also includes an LED display driver circuit layer. This LED display driver circuit layer is used to drive the LED light-emitting elements to display the image; that is, it controls the display functions of the LED display touch module, such as controlling the brightness, color, and operating status of the LED light-emitting elements.

[0080] It is understandable that an LED display touch module can control multiple light-emitting elements through an LED display driver circuit layer. These multiple light-emitting elements are arrayed and spaced apart. These light-emitting elements can also be called light-emitting pixels, lamp beads, etc. Figure 7 This diagram illustrates the arrangement of multiple light-emitting elements in an LED display touch module. In one implementation, these elements are soldered onto a substrate. Light-emitting elements are the core components for image display, including but not limited to light-emitting diodes (LEDs), organic light-emitting diodes (OLEDs), and miniature light-emitting diodes (Mini-LEDs). An LED is a semiconductor light-emitting device composed of P-type and P-type semiconductors. When current flows through it, electrons and holes recombine at the P-junction, releasing excess energy as light. Different semiconductor materials and doping elements produce different colors of light. OLEDs utilize the electroluminescence properties of organic materials. When current flows through it, injected electrons and holes recombine in the organic material layer, exciting organic molecules to produce singlet excitons. When the excitons return to the ground state, they release energy as light. Depending on the organic material, multiple colors such as red, green, and blue can be emitted, achieving full-color display. Mini-LEDs emit light using the same principle as traditional LEDs, through the recombination of electrons and holes in the semiconductor material. Mini-LEDs have a smaller chip size, typically between 50µm and 200µm, significantly smaller than traditional LED chips. Furthermore, compared to mainstream display technologies such as OLED and LCD, Mini-LED offers higher brightness, resolution, and color saturation, lower energy consumption, longer lifespan, and faster response speed.

[0081] It is understandable that the LED display driver circuitry layer generates a strong magnetic field during operation, which can cause electromagnetic interference to the touch function circuitry layer, affecting the sensitivity of the touch function. Therefore, Figure 9 A schematic diagram of another LED display touch module provided in an embodiment of this application is shown. Figure 9 As shown, the LED display touch module also includes an isolation layer, which is disposed between the LED display driving circuit layer and the touch function circuit layer. This isolation layer is used to shield the touch function circuit layer from interference from the magnetic field environment generated by the LED display driving circuit layer. In summary, in Figure 9In the design scheme shown, by setting an isolation layer between the LED display driver circuit layer and the touch function circuit layer, the influence of the magnetic field environment of the LED display driver circuit layer on the performance of the touch function circuit layer can be reduced, and the sensitivity of the touch function can be improved.

[0082] Understandably, while the isolation layer design can reduce electromagnetic interference, the performance of the touch function circuit layer may still be affected if the magnetic field environment is strong. Therefore, in one possible implementation provided in this application, the isolation layer uses a conductive material, such as solid copper. Because conductive materials have high conductivity, they significantly reflect high-frequency electromagnetic waves, thus improving the anti-electromagnetic interference effect. In another possible implementation provided in this application, the isolation layer is designed as a multi-layer structure to further reduce electromagnetic interference. Figure 10 A schematic diagram of the structure of another LED display touch module provided in an embodiment of this application is shown. Figure 10 As shown, the isolation layer includes multiple sub-isolation layers ( Figure 10 Taking sub-isolation layers 1 and 2 as examples, these multiple sub-isolation layers are made of conductive materials, such as solid copper. In this scheme, multiple sub-isolation layers are set between the touch function circuit layer and the LED display driving circuit layer, thereby increasing the thickness of the isolation layer and further reducing the impact of the strong magnetic field environment of the LED display driving circuit layer on the performance of the touch function circuit layer. It is understandable that in practical applications, the design of each layer needs to follow the general design specifications of the substrate, so the thickness of each layer is required. If there is only one isolation layer, the magnetic field isolation effect may be deteriorated due to insufficient thickness, affecting the performance of the touch function circuit layer. In this scheme, multiple sub-isolation layers are designed. Even if each sub-isolation layer follows the general design specifications of the substrate, the total thickness of the isolation layer can be significantly increased, thereby improving the magnetic field shielding effect. In another possible implementation provided in this application, the connecting material between the multiple sub-isolation layers is designed as a conductive material to further reduce electromagnetic interference. Figure 11 A schematic diagram of the structure of another LED display touch module provided in an embodiment of this application is shown. Figure 11 As shown, the isolation layer includes multiple sub-isolation layers ( Figure 11Taking sub-isolation layers 1 and 2 as examples, these multiple sub-isolation layers are connected by a conductive material, such as conductive PP material. The multiple sub-isolation layers use conductive materials, such as solid copper. In this scheme, multiple sub-isolation layers are set between the touch function circuit layer and the LED display driver circuit layer, and these multiple sub-isolation layers are connected by a conductive material. In this way, the conductive material in the middle of the sub-isolation layers can also be regarded as a sub-isolation layer, that is, the isolation layer is actually composed of multiple sub-isolation layers and the conductive material between the sub-isolation layers. Compared to... Figure 10 The proposed solution further increases the thickness of the insulating material in the isolation layer, thereby improving the effectiveness of magnetic field isolation.

[0083] It is understandable that the touch function circuit layer may also be affected by electrical charge, impacting touch sensitivity. Therefore, in one possible implementation provided in this application, the ground plane of the LED display touch module is continuously arranged and connected using multiple vias. The ground plane, also known as the horizon, is generally a continuous copper foil layer inside the substrate, serving as a ground reference plane for the entire board. This approach reduces interference to the touch function circuit layer and improves touch detection accuracy. Specifically, if the ground plane is not continuously designed or does not use vias, capacitance will be generated at these locations during actual operation, storing electrical charges that interfere with the electrical signals generated by the touch function circuit layer, thus affecting the touch function. Conversely, using a continuous ground plane and multiple vias suppresses electromagnetic coupling, reduces charge generation, and thus reduces interference to the touch function circuit layer.

[0084] The above solution provides an LED display touch module that directly integrates touch functionality, eliminating the need for an external infrared touch device and greatly simplifying the device structure. Specifically, the touch function circuit layer is located within the inner layer of the LED display touch module's encapsulation. This design significantly improves resistance to ambient light, dust, and moisture. For example, placing the touch function circuit layer within the inner layer of the encapsulation ensures that it is unaffected by ambient light, functioning normally in both bright light and dark environments. Its touch performance is not affected by changes in light, thus solving the problem in related technologies where infrared touch technology is easily interfered with by strong light (direct sunlight, strong lamplight), leading to touch malfunction or misjudgment. Furthermore, the surface of the LED display touch module is smooth and well-sealed thanks to its encapsulation layer, preventing dust and moisture from easily entering and affecting touch functionality. Even if there is a small amount of dust or moisture on the surface, it can be easily removed by wiping, with minimal impact on touch accuracy. This solves the problem in related infrared touch technologies where dust or moisture can obstruct the optical path between the infrared emitter and receiver, affecting infrared signal transmission and leading to decreased touch accuracy or even malfunction. Simultaneously, integrating the touch function circuitry layer inside the LED display touch module allows for borderless display, enabling viewers to focus their attention on the displayed content.

[0085] In addition, by rationally designing the structure and materials of the LED display touch module, such as setting an isolation layer between the touch function circuit layer and the LED display driver circuit layer, the interference between the touch function circuit layer and the LED display driver circuit layer can be reduced. This improves touch accuracy while ensuring the excellent display characteristics of the LED display panel, such as high brightness, high contrast, high color saturation and high resolution, providing clear, delicate and vivid image and video display effects.

[0086] In summary, the LED display touch module provided in this application can reduce the interference of external factors on the touch function while realizing LED display and touch functions. It ensures that the touch function can still accurately recognize the operation on the screen and transmit signals stably in complex environments, bringing users a smooth touch interaction experience.

[0087] Figure 12 This illustration shows a structural schematic of an LED touch system according to an embodiment of this application. The LED touch system is used to implement the touch function of an LED display screen. The LED display screen in this embodiment is composed of multiple LED display touch modules, forming a screen with both display and touch functions, such as... Figure 13 The LED display shown includes 16 LED display touch modules.

[0088] The LED touch control system includes multiple LED display touch modules as described in the preceding embodiments, and multiple first main control chips, second main control chips, terminal devices, etc., corresponding to the multiple LED display touch modules. For convenience, Figure 12 Only one set of LED display touch modules and the first main control chip are shown.

[0089] In response to a touch operation, the touch function circuit layer generates an electrical signal. The touch control IC in the LED display touch module is used to send an interrupt signal to the first main control chip when it detects the electrical signal generated by the touch function circuit layer and the change of the electrical signal exceeds a fourth threshold. During system startup, the touch control IC is initialized and configured, including setting the operating mode, sensitivity threshold (i.e., the fourth threshold), interrupt triggering method, etc.

[0090] like Figure 12 As shown, in one possible design, the first main control chip is set on the housing of the LED display touch module. The housing is usually composed of a metal frame and is used to integrate various components. Each LED display touch screen has a corresponding housing, that is, each LED display touch screen has a corresponding first main control chip.

[0091] The first main control chip is used to obtain a first touch feedback signal from the touch control integrated circuit based on an interrupt signal, and send the first touch feedback signal to the second main control chip. The first touch feedback signal includes the coordinate information of the touch point and the type of physical contact touch event. In other words, the above scheme uses an interrupt method to detect touch events in real time. When the touch control IC detects a change in the electrical signal exceeding a preset fourth threshold, it sends an interrupt signal to the first main control chip. Based on this interrupt signal, the first main control chip reads the coordinate information of the touch point from the status register of the touch control IC and determines the type of physical contact touch event. This touch event type includes single click, double click, long press, swipe, etc., and different touch event types correspond to different operation instructions.

[0092] Optionally, the first main control chip can also process the acquired data to reduce noise and improve the accuracy of touch detection. For example, a software filtering algorithm can be used to process the read touch data. For example, a median filtering algorithm can be used to read data multiple times and take the median value as the final coordinate information.

[0093] The second main control chip is used to convert coordinate information into screen coordinates based on the coordinate information, the resolution of the LED display screen, and the display area, and send a second touch feedback signal to the terminal device. The second touch feedback signal includes screen coordinates and the touch event type; the screen coordinates indicate the coordinate position of the touch point on the LED display screen. Combined with... Figure 13As illustrated in the example, an LED display screen consists of multiple LED display touch modules. For one of these modules, the touch control IC determines the position information of the touch point, indicating only the coordinates of the touch point relative to a single display panel, not its coordinates relative to the entire LED display screen. Therefore, this embodiment uses a second main control chip to convert the touch point's coordinates into screen coordinates. This second main control chip can be located in a sending card and is used to convert the coordinate information generated by the multiple LED display touch modules within the LED display screen.

[0094] A terminal device is used to perform corresponding operations based on the touch event type and screen coordinates. In this embodiment, the terminal device refers to a hardware device with an operating system capable of controlling content playback (video or image playback). After receiving a second feedback signal, the terminal device parses the signal to obtain the touch event type and screen coordinates, and performs corresponding operations, i.e., processing image or video data according to a preset interaction logic based on the touch event type and screen coordinates. For example, in a menu interface displayed on an LED screen, if the touch event type is "click" and the screen coordinates correspond to a menu control, the terminal device determines to open the corresponding menu option according to the preset interaction logic. At this point, data processing and image rendering are performed to generate new display data. Alternatively, an application program can be written to implement more interaction logic with touch functionality. For example, when displaying an image on an LED screen, if the terminal device determines the touch event type to be a two-finger relative swipe, it determines to zoom out of the image according to the pre-written interaction logic. At this point, data processing and image rendering are performed to generate new display data.

[0095] Furthermore, the terminal device sends the regenerated display data to the LED display touch module via a display signal to display the new user interface triggered by the physical touch. A brief explanation follows: The terminal device is also used to send the generated display signal to the second main control chip after performing the operation; the second main control chip is also used to send the display signal to the LED display touch module via the first main control chip; the LED display touch module is also used to drive the LED light-emitting elements to display the corresponding image based on the display signal through the LED display driver circuit layer.

[0096] Understandable, Figure 12 The structure shown is for illustrative purposes only. Depending on the requirements, the LED touch system may include more or fewer components. The main control chip can also be flexibly configured with a specific number of levels (such as single-level, double-level, triple-level, etc.) according to the solution requirements; this application does not impose any restrictions.

[0097] The above solution provides an LED touch system that supports touch operations on an LED display screen, enhancing the interactive experience and visual effects. For example, the touch operation in this LED touch system is convenient and intuitive; users can directly perform various operations by touching the screen, such as clicking, swiping, and zooming, without the need for external devices like a mouse or keyboard. This makes information acquisition and operation more convenient and natural, greatly improving interaction efficiency.

[0098] Figure 14 An exemplary flowchart of a control method 100 provided in an embodiment of this application is shown. This control method 100 is used to control the LED display touch module in the aforementioned embodiment to achieve touch functionality. It is understood that method 100 can be executed by one or more main control chips, for example by... Figure 12 The first and second main control chips in the LED touch system shown execute, therefore Figure 12 The solutions related to the first main control chip and the second main control chip can be referenced in method 100.

[0099] S110. After receiving an interrupt signal from the touch control integrated circuit, obtain the first touch feedback signal from the touch control integrated circuit.

[0100] For example, the interrupt signal is triggered when the change in the electrical signal exceeds the fourth threshold. The electrical signal is generated by the touch function circuit layer when physical contact is detected. The first touch feedback signal includes the coordinate information of the touch point and the touch event type of the physical contact. The touch event type includes single click, double click, long press, swipe, etc., and different touch event types correspond to different operation instructions.

[0101] S120. Convert the coordinate information into screen coordinates based on the coordinate information, the resolution of the LED display screen, and the display area.

[0102] For example, since the coordinate information can only reflect the position of the touch point in an LED display touch module, after obtaining the first touch feedback signal, the coordinate information is converted into screen coordinates according to the coordinate information, the resolution of the LED display screen and the display area. The screen coordinates are used to indicate the coordinate position of the touch point in the LED display screen, which is composed of multiple LED display touch modules.

[0103] S130, Send a second touch feedback signal to the terminal device.

[0104] For example, after determining the screen coordinates corresponding to the touch point, a second touch feedback signal is sent to the terminal device. The second touch feedback signal includes the screen coordinates and the touch event type.

[0105] The above provides a control method for implementing touch functionality. This method can feed back the position of the touch point on the display screen and the touch type to the terminal device, so that the terminal device can perform the corresponding operation according to the received information, thereby realizing the conversion from physical contact to the corresponding operation, that is, realizing the touch function of the LED display touch module.

[0106] S140, Receive display signals from terminal devices.

[0107] For example, the above-mentioned display signal is generated by the terminal device after performing a corresponding operation based on the second touch feedback signal, that is, the signal corresponding to the new display screen generated after the touch function is executed.

[0108] S150, Send display signals to the LED display touch module.

[0109] For example, after acquiring the display signal, the display signal is sent to the LED display touch module.

[0110] Through the above process, the display signal of the newly generated screen after touch can be sent to the LED display touch module, so that the LED display touch module can display the newly generated screen to the user.

[0111] It is understood that those skilled in the art can make equivalent substitutions or changes based on the technical solution and inventive concept of this application, and all such substitutions or changes should fall within the protection scope of this invention.

Claims

1. An LED display touch module, characterized in that, The inner encapsulation layer of the LED display touch module includes: The touch function circuit layer is used to generate electrical signals triggered by physical contact through multiple spaced touch sensing points; A touch control integrated circuit is used to detect the electrical signal and determine the coordinate information of the touch point corresponding to the physical contact based on the electrical signal.

2. The LED display touch module according to claim 1, characterized in that, Also includes: LED display driver circuit layer, used to drive LED light-emitting elements to display images; An isolation layer is disposed between the LED display driving circuit layer and the touch function circuit layer to shield the touch function circuit layer from interference by the magnetic field environment generated by the LED display driving circuit layer.

3. The LED display touch module according to claim 2, wherein the isolation layer is made of a conductive material.

4. The LED display touch module according to claim 2 or 3, characterized in that, The isolation layer includes multiple sub-isolation layers.

5. The LED display touch module according to any one of claims 1 to 3, characterized in that, The distance between adjacent touch sensing points among the plurality of touch sensing points is greater than or equal to a first threshold.

6. The LED display touch module according to any one of claims 1 to 3, characterized in that, The distance between the touch sensing point and the ground layer of the LED display touch module is greater than or equal to the second threshold and less than or equal to the third threshold.

7. The LED display touch module according to any one of claims 1 to 3, characterized in that, The ground plane of the LED display touch module is continuously arranged and connected by multiple vias.

8. The LED display touch module according to any one of claims 1 to 3, characterized in that, The touch control integrated circuit is arranged adjacent to the touch sensing point.

9. An LED touch control system, characterized in that, Includes an LED display touch module as described in any one of claims 1 to 8, a first main control chip connected to the LED display touch module, and a second main control chip; The touch control integrated circuit is also used to send an interrupt signal to the first main control chip when the change in the electrical signal exceeds a fourth threshold. The first main control chip is used to obtain a first touch feedback signal from the touch control integrated circuit according to the interrupt signal, and send the first touch feedback signal to the second main control chip. The first touch feedback signal includes the coordinate information of the touch point and the touch event type of the physical contact. The second main control chip is used to convert the coordinate information into screen coordinates according to the coordinate information, the resolution of the LED display screen and the display area, and send a second touch feedback signal to the terminal device. The second touch feedback signal includes the screen coordinates and the touch event type. The screen coordinates are used to indicate the coordinate position of the touch point on the LED display screen. The LED display screen is a screen with display and touch functions composed of multiple LED display touch modules in the LED touch system. The terminal device is used to perform corresponding operations based on the touch event type and the screen coordinates.

10. The LED touch system according to claim 9, characterized in that, The terminal device is also used to send the generated display signal to the second main control chip after performing the operation; The second main control chip is also used to send the display signal to the LED display touch module through the first main control chip; The LED display touch module is also used to drive the LED light-emitting elements to display the corresponding image based on the display signal through the LED display driving circuit layer.

11. A control method for controlling an LED display touch module as described in any one of claims 1 to 8, characterized in that, The control includes: After receiving an interrupt signal from the touch control integrated circuit, a first touch feedback signal is obtained from the touch control integrated circuit. The interrupt signal is triggered when the change in the electrical signal exceeds a fourth threshold. The first touch feedback signal includes the coordinate information of the touch point and the touch event type of the physical contact. The coordinate information is converted into screen coordinates based on the coordinate information, the resolution of the LED display screen, and the display area, and a second touch feedback signal is sent to the terminal device. The second touch feedback signal includes the screen coordinates and the touch event type. The screen coordinates are used to indicate the coordinate position of the touch point on the LED display screen. The LED display screen is a screen with display and touch functions composed of multiple LED display touch modules.

12. The control method according to claim 11, characterized in that, Also includes: The terminal device receives a display signal, which is generated by the terminal device after performing a corresponding operation based on the second touch feedback signal. The display signal is sent to the LED display touch module.

13. An LED display screen, characterized in that, The LED display screen includes: a memory and at least one main control chip, wherein the memory stores instructions, and the memory and the at least one main control chip are interconnected via a circuit; The at least one main control chip invokes the instructions in the memory to cause the LED display screen to execute the control method as described in claim 11 or 12.

14. A computer-readable storage medium storing a computer program thereon, characterized in that, When the computer program is executed by the processor, it implements the control method as described in claim 11 or 12.

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