LED display module

Abstract

The LED display module comprises a substrate, a plurality of LED lamp beads connected in parallel are arranged on the substrate, and each LED lamp bead 2 comprises a control chip, an input voltage detection circuit of the LED lamp bead, an RGB three-primary-color chip, an IN pin, a VCC pin and a GND pin; the IN pin is connected with the control chip, the control chip controls on or off of the RGB three-primary-color chip, and the input voltage detection circuit of the LED lamp bead is used for detecting the input voltage of the VCC pin. The device has the advantages of being low in equipment cost and good in environmental adaptability.

Description

Technical Field

[0001] This utility model relates to the field of LED lamp bead encoding technology, and specifically to an LED display module. Background Technology

[0002] Before the LED display module leaves the factory, each LED in the module must be uniquely coded, and its location and number information must be written into the central controller. This enables precise addressing control. The central controller locates each LED based on its code and independently controls its on / off state, color, brightness, and timing.

[0003] In existing technologies, this is generally achieved through an optical coding controller, which is an automated device integrating optical sensors and coding algorithms. The coding process is as follows: physical position calibration: a physical coordinate system (i.e., an XY grid) is generated on the substrate of the LED display module through grating positioning or laser marking, marking and determining the position coordinates of each LED bead; LED light emission detection and numbering: scanning row by row / column by column, the controller sequentially lights up the LED beads, a high-precision camera captures the light-emitting points, records the coordinates, and assigns a unique ID (such as row / column number or global number); unresponsive LED beads are marked as bad pixels, and their coordinates are recorded; data is written to the central controller, where the LED bead ID, coordinates, brightness / color calibration parameters, etc., are written to the controller database to generate a driver mapping table. While this method of encoding LED beads using an optical coding controller has many advantages, it also has the following disadvantages: firstly, high equipment cost: significant investment is required for high-resolution cameras, laser positioning systems, etc.; secondly, environmental sensitivity: ambient light interference may affect camera recognition (requiring a sealed darkroom or light filtering). Utility Model Content

[0004] The purpose of this application is to provide an LED display module that has the advantages of low equipment cost and good environmental adaptability.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A method for encoding LED beads in an LED display module includes the following steps:

[0007] S1. An input voltage detection circuit for detecting its own LED is integrated into the control chip of each LED.

[0008] S2. Connect several LED beads in parallel to form an LED display module with an LED bead matrix;

[0009] S3. LED voltage detection and numbering: The controller powers each LED sequentially, row by row or column by column, according to preset coordinate row or column addresses. Simultaneously, the input voltage detection circuit of each LED sequentially detects the input voltage value of its respective LED. The central controller obtains the input voltage value, assigns a unique ID, and records it. The central controller writes the ID and input voltage value of each LED into the controller database to generate a drive mapping table, thereby achieving the purpose of encoding using the voltage difference between the input terminals of two adjacent LEDs.

[0010] As an improvement to this utility model, the accuracy of the input voltage detection circuit is at least two decimal places.

[0011] As an improvement to this utility model, the input voltage detection circuit is a comparator or a differential amplifier.

[0012] As an improvement to this utility model, each LED bead includes a control chip, an input voltage detection circuit for the LED bead, and R / G / B three-primary-color chips, with IN pin, VCC pin, and GND pin; the IN pin is connected to the control chip, and the control chip controls the R / G / B three-primary-color chips to be turned on or off, and the input voltage detection circuit for the LED bead is used to detect the input voltage of the VCC pin.

[0013] This utility model also provides an LED display module, including a substrate, on which a plurality of parallel LED beads are provided. Each LED bead 2 includes a control chip, an input voltage detection circuit for the LED bead, an R / G / B three primary color chip, and an IN pin, a VCC pin, and a GND pin. The IN pin is connected to the control chip, and the control chip controls the R / G / B three primary color chip to be turned on or off. The input voltage detection circuit for the LED bead is used to detect the input voltage of the VCC pin.

[0014] As an improvement to this utility model, the accuracy of the input voltage detection circuit is at least two decimal places.

[0015] As an improvement to this utility model, the input voltage detection circuit is a comparator or a differential amplifier.

[0016] As an improvement to this utility model, the substrate is a hollowed-out transparent substrate.

[0017] As can be seen from the above, the LED display module provided by this utility model has an input voltage detection circuit integrated in the control chip of each LED bead. Encoding is achieved by detecting the voltage difference between adjacent LED beads, avoiding the use of high-cost optical equipment. It has the advantages of low equipment cost and good environmental adaptability. Attached Figure Description

[0018] Figure 1 This is a block diagram illustrating the coding method for fixed LED beads according to this utility model.

[0019] Figure 2 This is a schematic diagram of the structure of one embodiment of the LED display module of this utility model.

[0020] Figure 3 for Figure 2 A schematic diagram of the structure of the LED beads in the diagram. Detailed Implementation

[0021] The technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. The components of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of this application. All other embodiments obtained by those skilled in the art based on the embodiments of this application without inventive effort are within the scope of protection of this application. It should be noted that similar reference numerals and letters in the following drawings indicate similar items; therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. Furthermore, in the description of this application, the terms "first," "second," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0022] In existing technologies, LED display module LED chip encoding commonly employs optical positioning and image recognition technologies. A typical method involves using a high-precision camera to capture the position of the LED chips and then combining this with a laser positioning system to establish a physical coordinate system for encoding. This method relies on optical sensors and a closed detection environment, resulting in high equipment procurement costs and susceptibility to ambient light interference. In outdoor displays or high-brightness applications, changes in ambient light can easily lead to camera recognition errors, requiring additional darkrooms or filtering devices, significantly increasing system complexity and maintenance costs.

[0023] To address the aforementioned issues, the strong dependence of traditional encoding methods on optical equipment has become a technical bottleneck. Based on observations of circuit characteristics, it was found that the voltage drop distribution formed by current paths in parallel structures is identifiable. This led to an improvement: by integrating voltage detection functionality into the LED control chip, the encoding relationship can be established by capturing the voltage difference between adjacent nodes, thus eliminating the limitations of optical equipment. Further considering the stability of voltage gradients in parallel topologies, a line-by-line scanning method was adopted to collect the voltage characteristic values ​​of each node, constructing an encoding system based on electrical parameters.

[0024] Therefore, this utility model proposes a method for encoding LED beads in an LED display module (see...). Figure 1 and Figure 2 The input voltage detection circuit is integrated into the control chip of each LED bead. Multiple LED beads are connected in parallel to form a matrix. The controller powers on each row and collects the voltage value of each node. A unique ID is assigned according to the voltage difference to generate a drive mapping table.

[0025] The input voltage detection circuit is an electronic module capable of accurately measuring the voltage of the power supply pins. It can be implemented using a comparator or differential amplifier, and its function is to capture the voltage gradient distribution in the parallel path. Multiple LEDs are connected in parallel to form a current path, utilizing the inherent voltage characteristics of the parallel circuit to generate a distinguishable voltage difference sequence. The controller activates the LEDs row by row through preset addresses, synchronously collecting voltage data at each node during power-on. The physical location of the LED is determined by voltage difference identification, and a unique ID is assigned. The drive mapping table consists of the LED ID and its corresponding voltage value, and an algorithm establishes a mapping relationship between voltage difference and coordinate position.

[0026] Specifically, when the LED matrix is ​​powered on, current flows sequentially through the multiple LEDs connected in parallel. When the controller activates a row (or column) according to its address (the address is a pre-selected virtual address, see [link]),... Figure 2 Let the address of the first LED in the top row (first row) of the LED matrix be (1,1), then the address of the second LED in the same row is (1,2), and so on, with the address of the third LED being (1,3) and so on. Similarly, let the address of the first LED in the second row be (2,1), then the address of the second LED in the same row is (2,2), and so on, with the address of the third LED being (2,3) and so on. The input voltage detection circuit measures the voltage value of each LED's power supply pin in real time (each time an LED is lit, the controller obtains the VCC voltage value of that LED; for example, if the voltage value of the first LED at address (1,1) is +V5.00, the voltage value of the second LED at address (1,2) in the same row is +V4.99, the voltage value of the third LED at address (1,3) is +V4.98, etc., and these values ​​are recorded). Due to the resistive characteristics of the parallel structure, the input voltage of each LED forms a voltage difference compared to the preceding stage. After recording the voltage values ​​of each node, the central controller determines the arrangement order of the LEDs by analyzing the voltage differences between adjacent nodes, and assigns a unique identifier accordingly. The generated drive mapping table associates electrical parameters with physical locations, achieving voltage difference-based coded positioning.

[0027] Compared to existing technologies, traditional solutions rely on optical equipment for physical calibration, requiring high-resolution cameras and laser positioning systems. This solution achieves encoding through circuit characteristics, eliminating the need for optical sensors and directly removing the influence of ambient light interference. The introduction of a voltage detection circuit replaces image processing algorithms, simplifying the system architecture. The voltage gradient formed by the parallel topology provides a natural physical reference for encoding, avoiding the need for establishing an additional coordinate system.

[0028] Through the above technical solutions, this utility model effectively reduces the equipment investment cost of the encoding system and eliminates the interference of ambient light on encoding accuracy. The voltage detection method is not limited by lighting conditions and can be used for encoding operations in any environment. The self-characteristic voltage distribution of the parallel structure simplifies the position recognition process and improves the reliability and adaptability of the encoding system.

[0029] This invention further proposes that the accuracy of the input voltage detection circuit is at least two decimal places.

[0030] The requirement of at least two decimal places indicates that the voltage detection measurement resolution reaches the percentile level, such as an accuracy of 0.01 volts. This can be achieved using a high-precision comparator or differential amplifier. These circuits can accurately distinguish the input voltage difference between adjacent LEDs by amplifying minute voltage differences and converting them into digital signals. In parallel circuits, the input voltage of each LED decreases in a stepwise manner due to differences in line impedance or load. The voltage difference between adjacent LEDs may only be tens of millivolts. The accuracy of two decimal places ensures that the detection circuit can stably capture changes on the order of 0.01 volts, thereby avoiding encoding confusion caused by measurement errors. The requirement of at least two decimal places does not exclude three or four decimal places.

[0031] Specifically, when the LED display module is powered on, the input voltage of the parallel-connected LED beads decreases progressively. While the controller assigns a unique ID to each LED bead by scanning row by row or column by column, the input voltage detection circuit measures the input voltage value of each LED bead in real time. For example, if the input voltage of one LED bead is 5.00 volts, and the input voltage of its adjacent downstream LED bead is 4.99 volts, the voltage difference between them is 0.01 volts. A detection circuit with two decimal places can accurately identify this voltage difference and transmit the corresponding voltage value to the central controller. The controller maps the voltage difference between adjacent LED beads to a specific encoding rule based on a preset voltage difference threshold range, thereby achieving reliable LED bead numbering. If the detection accuracy is insufficient, for example, only able to detect changes in the 0.1 volt range, the voltage difference between adjacent LED beads may not be effectively distinguished, leading to encoding errors.

[0032] Compared to existing technologies, traditional optical positioning-based encoding methods rely on high-resolution cameras and enclosed environments to avoid ambient light interference. This solution, however, directly acquires the physical pressure difference signal through a voltage detection circuit, eliminating the need for complex optical equipment and darkroom conditions. In existing technologies, camera recognition accuracy is limited by pixel resolution and ambient light intensity, while the voltage detection circuit achieves encoding through electrical signal processing, resulting in stronger anti-interference capabilities and significantly reduced hardware costs.

[0033] Through the above technical solution, this utility model solves the problem of incorrect encoding of adjacent LED beads caused by insufficient detection accuracy, ensuring that small voltage differences between parallel LED beads can be stably identified. For example, in a scenario where the adjacent voltage difference is 0.03 volts, a circuit with two decimal places can still accurately distinguish and generate a unique ID, avoiding multiple LED beads being assigned duplicate codes due to measurement errors. This solution further reduces the dependence of the encoding process on high-cost equipment, while improving adaptability to complex environmental conditions.

[0034] This invention further proposes that the input voltage detection circuit uses a comparator or differential amplifier to acquire voltage signals.

[0035] The comparator is a circuit module that can quickly compare two input voltages and output high and low level signals. It can be implemented using the LM393 integrated circuit, and identifies the voltage difference between adjacent LEDs by setting a threshold voltage value. The differential amplifier is an operational amplifier with two input terminals that amplifies the voltage difference between them. It can be implemented using the INA128 instrumentation amplifier, which has a common-mode rejection ratio of over 100dB, effectively suppressing the influence of line noise on small voltage differences.

[0036] Specifically, during line-by-line scanning, when a particular LED is powered on, its control chip's comparator compares the input voltage with a preset reference value in real time. When the voltage exceeds a threshold, a trigger signal is output. This signal is captured by the central controller, completing the voltage characteristic acquisition for the current position. If a differential amplifier is used, the voltage difference between the current LED and the previous LED is measured. The amplified signal is then processed by an analog-to-digital converter to form a recognizable digital quantity, which is mapped to the physical position of the LED. Both circuits can achieve microvolt-level voltage difference detection, ensuring that the voltage drop difference between adjacent LEDs in parallel is effectively captured.

[0037] Compared to existing technologies, traditional optical inspection requires high-resolution industrial cameras and enclosed darkrooms, while this solution directly acquires electrical parameters through circuit-level signal processing, eliminating the impact of ambient light fluctuations on inspection accuracy. Using a comparator eliminates the need for complex signal conditioning circuits, resulting in a compact circuit structure and microsecond-level response speed. Furthermore, using a differential amplifier maintains a detection sensitivity of 0.1mV even in the presence of common-mode interference, reducing hardware costs by more than 85% compared to optical inspection equipment.

[0038] Through the above technical solution, this utility model successfully constructed a lamp bead positioning mechanism based on electrical parameter detection, achieving sub-millimeter positioning accuracy without optical sensing equipment. The detection system can operate stably in a conventional workshop lighting environment, and the single-point detection time is shortened to less than 5ms, effectively solving the core technical bottlenecks of high purchase cost and poor environmental adaptability of high-precision optical detection equipment.

[0039] This invention further proposes that each LED bead includes a control chip, an input voltage detection circuit for the LED bead, R / G / B three primary color chips, and an IN pin, a VCC pin, and a GND pin; the IN pin is connected to the control chip, which controls the R / G / B three primary color chips to turn on or off, and the input voltage detection circuit for the LED bead is used to detect the input voltage of the VCC pin.

[0040] The control chip is an integrated circuit used to process signals and control the color and brightness of LED beads. It can be implemented using a microcontroller or a dedicated driver chip, adjusting the operating state of the R, G, and B primary color chips by receiving commands. The input voltage detection circuit is an electronic module used to measure the voltage value at the power input terminal of the LED beads. It can be implemented using a comparator or a differential amplifier, providing data for encoding by real-time detection of voltage changes at the VCC pin. The R, G, and B primary color chips are LED components composed of red, green, and blue light-emitting units. They can be implemented using common cathode or common anode packages, achieving full-color display by independently controlling each color channel. The IN pin is the electrical interface used to connect adjacent LED beads in parallel. It can be implemented using metal pins or pad structures, forming a voltage gradient distribution through parallel connection. The VCC and GND pins are the positive and negative interfaces providing power to the LED beads. They can be implemented using gold-plated contacts or conductive adhesive connections, ensuring voltage detection accuracy through stable power supply.

[0041] Specifically, the control chip inputs a control signal to the IN pin, and multiple LED beads are connected in parallel to form a display module. When the controller powers on a specific row or column, a regular voltage drop is generated in the parallel link. The input voltage detection circuit collects the input voltage value at the VCC pin in real time, and this voltage value exhibits different characteristics depending on the position of the LED bead. The central controller reads the detected voltage of each LED bead, combines it with a preset scanning sequence, calculates the voltage difference characteristics between adjacent LED beads, and then assigns a unique identification code to each LED bead. During the encoding process, the control chip can selectively disable the light emission function of the R, G, and B primary color chips to avoid interference from the light signal to the voltage detection. The assigned identification code and voltage characteristic value are written together into the driver mapping table to form a correspondence between the LED bead position and electrical parameters.

[0042] Compared to existing technologies, traditional encoding methods rely on optical sensors and image processing systems for position calibration, requiring high-resolution cameras and enclosed detection environments. This solution, however, directly acquires electrical characteristic parameters through a built-in voltage detection circuit, eliminating the need for optical detection equipment and a darkroom environment. Traditional methods are prone to recognition errors under strong ambient light, while this solution encodes based on physical circuit characteristics, unaffected by lighting conditions. Traditional encoding requires a separate coordinate marking process, while this solution completes encoding simultaneously during the powered-on scanning process, simplifying the production workflow.

[0043] Through the above technical solution, this utility model achieves automatic LED bead encoding without optical inspection equipment, effectively reducing equipment investment costs. Position identification is achieved by utilizing the inherent voltage distribution characteristics of parallel circuits, eliminating interference from ambient light during the encoding process. Through the coordinated operation of the control chip and the input voltage detection circuit, encoding data acquisition is completed synchronously during routine power-on testing, improving production efficiency. The integrated circuit design ensures compatibility between the encoding process and the LED bead drive control functions, guaranteeing the operational stability of the display module.

[0044] See Figure 2 and Figure 3 This utility model further proposes an LED display module, including a substrate 1, on which a plurality of parallel LED beads 2 are provided. Each LED bead 2 includes a control chip 21, an input voltage detection circuit for the LED bead, and R / G / B three primary color chips, with IN pin, VCC pin and GND pin. The IN pin is connected to the control chip, and the control chip controls the R / G / B three primary color chips to be turned on or off. The input voltage detection circuit for the LED bead is used to detect the input voltage of the VCC pin.

[0045] Among them, substrate 1 refers to the base structure that carries LED beads, which can be made of flexible or rigid materials and the position of the beads is fixed by physical connection.

[0046] Among them, the parallel LED beads 2 refers to multiple beads connected end to end to form a closed circuit, which can be achieved by welding or conductive glue, so that the current flows through each bead in sequence to form a voltage gradient.

[0047] The input voltage detection circuit refers to the electronic module that detects the voltage of the VCC pin. Specifically, it can be implemented using a comparator or a differential amplifier. Position encoding is achieved by capturing the voltage difference between adjacent LEDs.

[0048] The IN pin refers to the input / output pin connected to the control chip, which can be implemented through metal contacts. It is used to receive signals from the previous stage and transmit control commands to the next stage.

[0049] Specifically, substrate 1 serves as the physical carrier of the LED matrix. This invention establishes a current transmission path through parallel connections. The control chip 21 of each LED 2 receives signals from the preceding stage via its IN pin. The input voltage detection circuit monitors the voltage value of the VCC pin in real time. Due to the inherent resistance differences among the LEDs in the parallel circuit, the input voltages of LEDs at different locations form a decreasing sequence. The central controller analyzes the voltage values ​​reported by each LED, generates a unique code based on the voltage values ​​between different LEDs, and associates the code with the physical location, writing it into the drive mapping table. This process does not rely on optical equipment; it only utilizes the electrical characteristics of the circuit itself to complete position identification.

[0050] Compared to existing technologies, traditional solutions require high-resolution cameras to capture the light source and laser positioning to generate coordinates. This solution, however, uses circuit-level voltage detection for encoding, eliminating the need for optical sensors and darkroom equipment. Furthermore, the voltage detection is unaffected by ambient light and can operate stably under complex lighting conditions.

[0051] Through the above technical solution, this utility model realizes low-cost encoding of LED beads, eliminates the dependence on high-precision optical equipment, reduces system complexity and environmental sensitivity, and improves the reliability and adaptability of the encoding process.

[0052] This invention further proposes that the accuracy of the input voltage detection circuit is at least two decimal places.

[0053] The input voltage detection circuit is a circuit module integrated into the LED control chip. It is used to detect the voltage value between the input terminal of the LED and adjacent LEDs in a parallel connection. Specifically, it can be implemented using a high-precision comparator or differential amplifier with millivolt-level resolution. Its function is to provide a distinguishable voltage signal to the central controller by capturing minute voltage drop differences.

[0054] The accuracy of at least two decimal places means that the measurement result can be resolved to the level of 0.01 volts. For example, within a voltage difference range of 5.00 volts to 4.99 volts, it can accurately identify the input voltage difference between adjacent LEDs. Its function is to overcome the small voltage drop fluctuations caused by differences in line impedance or component characteristics, and to avoid confusion between the codes of adjacent LEDs due to insufficient detection accuracy.

[0055] Specifically, in the LED display module, when the controller powers on the LEDs sequentially according to row and column addresses, the input voltage detection circuit of each LED transmits its real-time detected voltage value to the central controller. Because the LEDs are connected in parallel, impedance differences between adjacent LEDs create a stepped voltage drop distribution. For example, on a parallel link with a total voltage drop of 0.1 volts, if the detection accuracy is only one decimal place, adjacent LEDs may measure the same 5.0 volt input value; however, by increasing the accuracy to two decimal places, the difference between 5.00 volts and 4.99 volts can be distinguished. The central controller assigns a unique ID based on this difference and generates a driver mapping table, thereby achieving an optically-free encoding mechanism.

[0056] Compared to existing technologies, current encoding methods rely on high-resolution cameras and optical recognition in enclosed environments, resulting in high equipment costs and susceptibility to ambient light interference. This solution, however, replaces optical positioning with voltage detection, eliminating the need for cameras and filtering facilities. Encoding can be completed in conventional production environments, while simultaneously reducing hardware investment costs.

[0057] Through the above technical solution, this utility model solves the problem of adjacent LED encoding errors caused by insufficient voltage detection accuracy, ensuring that the central controller can assign unambiguous IDs based on accurate voltage difference values. This solution avoids the dependence on high-cost equipment in traditional optical encoding, while eliminating the impact of ambient light interference on the encoding process, thus improving the reliability and adaptability of the encoding system.

[0058] This invention further proposes that the input voltage detection circuit is a comparator or a differential amplifier.

[0059] A comparator is a circuit module that compares the magnitudes of two voltage signals. It can be implemented using an operational amplifier or a dedicated comparator chip. Its function is to quickly identify the voltage difference between the input terminals of adjacent LED beads by setting a threshold voltage, thus providing a clear discrimination signal for encoding. A differential amplifier is a circuit module that amplifies the difference between two input signals. It can be implemented using an instrumentation amplifier or a fully differential operational amplifier. Its function is to linearly amplify the small voltage difference signal between the input terminals of adjacent LED beads, thereby improving the voltage detection resolution.

[0060] Specifically, when the controller powers on each LED row or column in a preset sequence, the input voltage of each LED experiences a stepped voltage drop due to the impedance of the parallel lines. The comparator compares the current LED's input voltage with a reference threshold, outputting high and low level signals to distinguish the voltage difference between adjacent LEDs. The differential amplifier directly acquires and amplifies the voltage difference between adjacent LEDs, transmitting the amplified difference signal to the central controller. Based on the comparator's judgment result or the amplified signal from the differential amplifier, the central controller identifies the voltage characteristic value of each LED and assigns a unique ID, generating the encoding mapping table without relying on optical equipment.

[0061] Compared to existing technologies, traditional methods rely on high-resolution cameras to capture the coordinates of the light source and require eliminating ambient light interference in a dark room. This solution, however, directly utilizes circuit detection of voltage differences to achieve encoding, avoiding the costs of optical equipment and environmental sensitivity issues. The comparator or differential amplifier circuit structure is standardized and can be directly integrated into the LED control chip, eliminating the need for additional positioning devices or filtering equipment.

[0062] Through the above technical solution, this utility model achieves high-precision detection of the differential pressure at the input end of the LED lamp bead, ensuring that the encoding process is completed only through electronic signal processing, eliminating the dependence of traditional optical encoding methods on darkroom environment and high-cost equipment, while reducing system complexity and maintenance costs.

[0063] This invention further proposes that the substrate 1 is a hollow transparent substrate.

[0064] Among them, the perforated transparent substrate refers to a load-bearing component with light-transmitting properties and a perforated structure on its surface. Specifically, it can be achieved by using transparent materials such as polycarbonate, acrylic, or tempered glass, combined with laser etching technology to form the perforated structure. The shape of the perforations can be grid-like, honeycomb-like, or strip-like. Flexible PCB material is placed in the perforated areas to maintain circuit connectivity. The light-transmitting function is achieved by reducing the solid area covered by the substrate. This structure allows the substrate to maintain its supporting strength while forming a light transmission channel.

[0065] Specifically, substrate 1 is designed as a transparent material layer with a perforated distribution. When the LED display module is installed in a glass curtain wall or transparent screen, external light can pass through the perforated structure and transparent material of the substrate. During manufacturing, by controlling the size and distribution density of the perforations, the substrate achieves maximum light transmission area while retaining the necessary circuit trace areas. In terms of heat dissipation, the airflow channels formed by the perforated structure accelerate the dissipation of heat generated by the LED chips to the surrounding environment.

[0066] Compared to existing technologies, traditional substrates using solid, opaque materials completely block light, making them unsuitable for installations in light-transmitting environments. In contrast, the perforated transparent substrate, through a dual design of material transparency and physical openings, establishes a light transmission path while maintaining the integrity of circuit functionality. In existing technologies, the fully enclosed structure of the substrate hinders air convection and heat dissipation; this solution improves heat dissipation efficiency by creating natural airflow channels through its perforated structure.

[0067] Through the above technical solution, this utility model solves the problem of limited installation scenarios caused by the opaque substrate of traditional LED display modules, enabling the module to be directly applied to light-transmitting scenarios such as glass curtain walls; the reduction in substrate weight enhances the deformation capability of flexible PCB, making it more compatible with curved mounting surfaces; the heat dissipation path formed by the hole structure effectively reduces the operating temperature of the LED beads, avoiding light decay caused by overheating.

[0068] The above description is merely an embodiment of this application and is not intended to limit the scope of protection of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. An LED display module, characterized in that, The system includes a substrate (1), on which a plurality of parallel LED beads (2) are provided. Each LED bead (2) includes a control chip (21), an input voltage detection circuit for the LED bead, an R\G\B three primary color chip, and an IN pin, a VCC pin, and a GND pin. The IN pin is connected to the control chip, which controls the R\G\B three primary color chip to turn on or off. The input voltage detection circuit for the LED bead is used to detect the input voltage of the VCC pin.

2. The LED display module according to claim 1, characterized in that, The accuracy of the input voltage detection circuit is at least two decimal places.

3. The LED display module according to claim 2, characterized in that, The input voltage detection circuit is a comparator or a differential amplifier.

4. The LED display module according to claim 1 or 2, characterized in that, The substrate (1) is a hollow transparent substrate.

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