LED display screen and waterproof self-checking device thereof
By employing a waterproof and breathable structure and a pressure-detecting self-testing device, the problem of water leakage in outdoor LED displays has been solved. This ensures that the internal sealed space is breathable while preventing water from entering, avoiding excessive pressure, and extending the service life.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- UNILUMIN GRP
- Filing Date
- 2025-05-08
- Publication Date
- 2026-05-15
AI Technical Summary
Existing outdoor LED displays are prone to water leakage during use due to the lack of water leakage detection mechanisms, which can damage internal electronic components and affect their lifespan.
The waterproof self-testing device, consisting of a waterproof and breathable structure, connecting pipes, pressure detection components, and a controller, determines whether there is a water leakage problem by detecting the pressure change value of the internal sealed space, and performs self-tests when the device is turned on and off.
It enables timely detection of water leakage problems, avoids damage to internal electronic components, extends the service life of the LED display screen, and allows for ventilation while maintaining a sealed and waterproof seal, preventing excessive internal pressure from affecting its use.
Smart Images
Figure CN224247241U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and in particular to an LED display screen and its waterproof self-testing device. Background Technology
[0002] The biggest cause of failure for outdoor displays has always been waterproofing. If outdoor displays are waterproof, their operating environment is better than that of indoor displays, because indoor displays mostly have an open structure, allowing dust and microorganisms to infiltrate and cause damage. Therefore, most existing outdoor displays use a sealed structure, meaning their waterproofing performance mainly relies on structural sealing. To ensure this sealing and waterproofing, existing outdoor displays undergo a series of tests before leaving the factory, such as water spray tests, immersion tests, and pressure tests. However, in actual use, it has been found that although existing outdoor displays undergo factory testing to ensure their sealing and waterproofing performance, frequent disassembly and maintenance, and exposure to harsh environments such as wind, rain, sun, and high temperatures during actual use make leakage problems unavoidable. Furthermore, the lack of specialized leakage testing agencies means that personnel cannot promptly detect leakage problems, making existing outdoor displays prone to damage to internal electronic components due to water leakage, thus affecting their lifespan. Utility Model Content
[0003] This application provides an LED display screen and its waterproof self-testing device, aiming to improve the technical problem that existing outdoor LED displays are prone to damage to various internal electronic components due to water leakage, thereby affecting their service life.
[0004] Therefore, this application provides a waterproof self-testing device for use in LED displays, including a controller, a connecting pipe, a pressure detection element, and a waterproof and breathable structure.
[0005] The waterproof and breathable structure is installed on the surface of the LED display screen and is used to connect the internal sealed space of the LED display screen with the external environment when it is opened;
[0006] The connecting pipe is built into the internal sealed space. One end of the connecting pipe is connected to the waterproof and breathable structure, and the other end of the connecting pipe is provided with the pressure detection element.
[0007] The pressure detection device is built into the internal sealed space and is used to detect the pressure change value of the internal sealed space.
[0008] The controller is electrically connected to the pressure detection device and the waterproof and breathable structure, respectively, and is used to control the opening and closing of the waterproof and breathable structure, and to determine whether there is a water leakage problem in the internal sealed space based on whether the pressure change value detected by the pressure detection device reaches a preset threshold.
[0009] Optionally, in some embodiments of this application, the waterproof and breathable structure includes a waterproof and breathable valve and a normally open solenoid valve for controlling the opening and closing of the waterproof and breathable valve, wherein the normally open solenoid valve is electrically connected to the controller.
[0010] Optionally, in some embodiments of this application, the connecting pipe is a flexible hose structure.
[0011] Optionally, in some embodiments of this application, a temperature sensor is further included. The temperature sensor is built into the internal sealed space and electrically connected to the controller for detecting temperature changes in the internal sealed space. The controller is used to determine the degree of sealing of the internal sealed space based on the pressure changes detected by the pressure sensor and the temperature changes detected by the temperature sensor.
[0012] Optionally, in some embodiments of this application, a pressure regulating module is further included. The pressure regulating module is built into the internal sealed space and electrically connected to the controller for adjusting the air pressure of the internal sealed space.
[0013] Optionally, in some embodiments of this application, the pressure regulating module is an air pump, which is used to adjust the air pressure of the internal sealed space by pumping or inflating the internal sealed space when the waterproof and breathable structure is closed.
[0014] Optionally, in some embodiments of this application, the pressure regulating module is a temperature regulating component, which is used to regulate the air pressure of the internal sealed space by heating or cooling the internal sealed space when the waterproof and breathable structure is closed.
[0015] Optionally, in some embodiments of this application, a water leakage warning module is also included. The water leakage warning module is disposed on the surface of the LED display screen and electrically connected to the controller. When the controller determines that there is a water leakage problem in the internal sealed space, it provides a water leakage warning to relevant personnel.
[0016] Optionally, in some embodiments of this application, the water leakage warning module is an indicator light or an alarm.
[0017] In addition, this application embodiment also provides an LED display screen, including the display screen body and the aforementioned waterproof self-testing device.
[0018] The technical solution provided in this application, through the above-mentioned structural setting, allows the controller to synchronously close the waterproof and breathable structure each time the LED display is powered on. Simultaneously, a pressure detection device reads the current pressure value of the internal sealed space, which is equivalent to the ambient air pressure (because the internal sealed space remains connected to the external environment when the waterproof and breathable structure is open). Since the LED display starts working immediately after power-on, the power supply and driver LEDs in the internal sealed space generate heat, causing the temperature of the internal sealed space to rise. Typically, the display temperature rises by about 30°C. As the temperature rises, the pressure in the internal sealed space also rises. The corresponding pressure value (i.e., the preset threshold) can be calculated using the gas equation. If there is no leakage (i.e., no water leakage), the pressure will rise normally until the pressure change reaches or slightly exceeds the preset threshold. If there is leakage (i.e., water leakage), the pressure usually will not rise, or the rise will be insufficient, meaning the pressure change will be lower than the preset threshold. This is the waterproof self-check during startup. The waterproof self-test device of this application can also perform a waterproof self-test when the LED display screen is powered off. Specifically, each time the LED display screen is powered off, a delayed shutdown process is initiated. During this time, the LED display screen's display is off, and the power supply and other heat-generating components are in standby mode, consuming very little power and generating very little heat. At this point, the waterproof and breathable structure can be closed via the controller. Hot air cannot escape to the outside environment from the sealed internal space. As the temperature decreases, the pressure decreases, and with heat dissipation, the temperature drops to near room temperature. If there is no leakage, the pressure in the sealed internal space will decrease until it becomes negative pressure, meaning the pressure is lower than the ambient air pressure. The pressure change reaches or slightly exceeds a preset threshold. If there is a leak, the pressure in the sealed internal space will decrease but will not become negative pressure, eventually aligning with the ambient air pressure, meaning the pressure change will be lower than the preset threshold. This is the waterproof self-test during shutdown. Thus, this waterproof self-test device, whether performing a waterproof self-test during startup or shutdown, can promptly detect water leakage problems in the LED display screen, ensuring its lifespan. In addition, because its waterproof and breathable structure can remain open during the daily use of the LED display screen, the internal sealed space of this application's LED display screen can remain sealed and waterproof in other parts while allowing air to pass through the sealed space and preventing water from entering. This avoids the problem of excessive internal pressure caused by the air volume increasing with temperature due to prolonged screen operation when the internal sealed space is completely sealed, thus affecting the lifespan of the LED display screen. Therefore, this technical solution effectively improves the technical problem of existing LED displays being prone to damage to various internal electronic components due to water leakage, thereby affecting their lifespan. Attached Figure Description
[0019] 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 only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a simplified layout diagram of the waterproof self-testing device in an LED display screen according to an embodiment of this application;
[0021] Figure 2 This is a schematic diagram of the LED display screen in an embodiment of this application;
[0022] Figure 3 for Figure 2 The diagram shows another angle of the LED display screen.
[0023] Figure 4 for Figure 2 The diagram shows a disassembled structure of the power supply box for the LED display screen. Detailed Implementation
[0024] The technical solutions of the embodiments 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. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.
[0025] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.
[0026] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of a person skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, the user should consider such a combination of technical solutions to be non-existent and not within the scope of protection claimed in this application.
[0027] As is well known, the sealed structure used for waterproofing outdoor displays creates a closed space inside. The air within this closed space expands in volume as the temperature rises, further increasing the pressure. Specifically, the pressure increases by 1 kPa for every 3 degrees Celsius increase in temperature. Outdoor displays typically have high brightness, and their temperature gradually rises from room temperature after being turned on, with a temperature increase of approximately 30 degrees Celsius. This causes the internal pressure to increase by more than 10 kPa. Therefore, outdoor displays urgently need a waterproof and breathable structure to allow for ventilation while preventing water ingress.
[0028] In one embodiment, such as Figures 1 to 4 As shown in the figure, this application embodiment provides a waterproof self-testing device 100, which includes a controller (not shown), a connecting pipe 110, a pressure detection element 120, and a waterproof and breathable structure 130. The waterproof and breathable structure 130 is disposed on the surface of the LED display screen 200 and is used to connect the internal sealed space of the LED display screen 200 to the external environment when opened. The connecting pipe 110 is built into the internal sealed space, with one end connected to the waterproof and breathable structure 130 and the other end of the connecting pipe 110 having a pressure detection element 120. The pressure detection element 120, built into the internal sealed space, is used to detect pressure changes in the internal sealed space. The pressure detection element 120 can be a pressure sensor, a pressure switch, or other devices used to detect pressure values. The controller is electrically connected to both the pressure detection element 120 and the waterproof and breathable structure 130, and is used to control the opening and closing of the waterproof and breathable structure 130, and to determine whether there is a water leakage problem in the internal sealed space based on whether the pressure change value detected by the pressure detection element 120 reaches a preset threshold.
[0029] It is understood that the waterproof self-testing device 100 in this embodiment is mainly applied to the LED display screen 200, which is mainly used in outdoor scenarios, to realize the waterproof self-testing function of the LED display screen 200. The aforementioned waterproof and breathable structure 130 is preferably disposed on the surface of the LED display screen 200, or preferably on other surfaces of the LED display screen 200 besides the display surface. For example, the waterproof and breathable structure 130 can be disposed on any side of the LED display screen 200 or on the back opposite the display surface. The pressure detection element 120 detects the pressure change value of the internal sealed space, which mainly refers to the pressure detection element 120 obtaining the corresponding pressure change value by detecting the pressure value of the internal sealed space at different times.
[0030] In this way, the waterproof self-test device 100 in this embodiment of the application, through the above-mentioned structural setting, can synchronously control the waterproof and breathable structure 130 to close each time the LED display 200 is turned on, and at the same time read the pressure value of the current internal sealed space through the pressure detection element 120. The pressure value at this time is equivalent to the external ambient air pressure (because when the waterproof and breathable structure 130 is open, the internal sealed space is connected to the external environment). Since the LED display 200 starts working immediately after being turned on, the power supply and driver chip and other heat-generating components in the internal sealed space will generate heat, causing the temperature of the internal sealed space to rise. The temperature rise of the display is usually about 30°. As the temperature rises, the pressure of the internal sealed space also rises. The corresponding theoretical pressure value (i.e., the preset threshold) can be calculated through the gas equation. If there is no leakage (i.e., no water leakage problem), the pressure will rise normally until the pressure change value reaches the preset threshold. If there is leakage (i.e., there is water leakage problem), the pressure usually will not rise, or the rise will not be enough, that is, the pressure change value will be significantly lower than the preset threshold. This is the waterproof self-test at startup. The waterproof self-test device 100 of this application can also perform a waterproof self-test when the device is powered off. That is, each time the LED display screen 200 is powered off, a delayed shutdown process is initiated. At this time, the display screen of the LED display screen 200 is turned off, and the power supply and other heat-generating devices are in standby mode, with very low power consumption and very low heat generation. At this time, the waterproof and breathable structure 130 can be closed by the controller. At this time, the hot air cannot be exhausted to the outside environment in the internal sealed space. As the temperature decreases, its pressure will decrease. As heat is dissipated, the temperature will decrease to near room temperature. If there is no leakage, the pressure value of the internal sealed space will decrease until a negative pressure occurs, that is, the pressure value is lower than the external ambient air pressure. The pressure change value reaches the preset threshold. If there is a leak, the pressure value of the internal sealed space will decrease, but a negative pressure will not occur. In the end, it will only be consistent with the external ambient air pressure, that is, the pressure change value will be lower than the preset threshold. This is the waterproof self-test when powered off. Thus, this waterproof self-testing device 100 can promptly detect water leakage problems in the LED display screen 200, whether performing a waterproof self-test during startup or while it is not shut down, ensuring the service life of the LED display screen 200. Furthermore, because its waterproof and breathable structure 130 can remain open during daily use of the LED display screen 200, the internal sealed space of the LED display screen 200 can be kept sealed and waterproof in other parts while allowing air to pass through the waterproof and breathable structure 130, thus preventing water from entering. This avoids the problem of excessive internal pressure caused by the air volume increasing with temperature due to prolonged screen operation when the internal sealed space is completely sealed, which would affect the service life of the LED display screen 200.
[0031] In some examples, such as Figure 1As shown, the waterproof and breathable structure 130 includes a waterproof and breathable valve 131 and a normally open solenoid valve 132 for controlling the opening and closing of the waterproof and breathable valve 131. The normally open solenoid valve 132 is electrically connected to the controller. Thus, the structure of the normally open solenoid valve 132 ensures that the waterproof and breathable valve 131 remains open during the daily use of the LED display screen 200, while allowing the controller to freely control the opening and closing of the waterproof and breathable valve 131 through the normally open solenoid valve 132.
[0032] In some examples, such as Figure 1 As shown, the connecting pipe is a flexible hose. This flexible hose design allows for better placement within the LED display screen 200's internal space, enabling the pressure sensor 120 to be positioned appropriately according to actual needs.
[0033] In some examples, the waterproof self-testing device 100 also includes a temperature sensor (not shown), which is built into the internal sealed space and electrically connected to the controller to detect temperature changes within the sealed space. The controller determines the sealing degree of the internal sealed space based on the pressure changes detected by the pressure sensor 120 and the temperature changes detected by the temperature sensor. Thus, the structure of the temperature sensor allows the controller to more accurately and in real-time detect temperature changes within the internal sealed space, and consequently, to more accurately determine the sealing degree of the internal sealed space (i.e., the waterproof rating of the internal sealed space) based on the pressure changes detected by the pressure sensor 120 and the temperature changes detected by the temperature sensor.
[0034] Understandably, the detection principle of the waterproof self-testing device 100 in this example is as follows: In a sealed space, when the temperature rises by 30 degrees Celsius, the change in pressure can be analyzed using the ideal gas law. According to Charles's Law (when volume is constant, pressure is directly proportional to absolute temperature), the formula is: P1 / T1 = P2 / T2, where P1 and T1 are the initial pressure and initial temperature (in Kelvin), and P2 and T2 are the pressure and temperature after the temperature rise. A temperature change of 30 degrees Celsius is equivalent to a change of 30 Kelvin, therefore (T2 = T1 + 30). The pressure change Delta P is calculated as follows: Delta P = P2 - P1 = P1 * (T2 - T1) / T1 = P1 * 30 / T1; Assuming the initial pressure is standard atmospheric pressure (i.e., P1 = 101.325 kPa) and the initial temperature is 0 degrees Celsius (i.e., T1 = 273.15 Kelvin), then: Delta P = 101.325 * 30 / 273.15 = 11.13 kPa; After rounding, the pressure increase is approximately 11 kPa. The waterproof self-testing device 100 in this example can use this as a basis to test the waterproof performance of the display cabinet based on the conversion between pressure and waterproof rating. The specific conversion relationship between pressure and waterproof rating is as follows: IPX5 pressure is 3-5 kPa; IPX6 pressure is 5-8 kPa; IPX7 pressure is 10 kPa; IPX8 pressure is 20-100 kPa. The conversion relationship is used as a waterproof standard. For example, if a display cabinet with a waterproof rating of IPX5 is heated and the air pressure rises (i.e., the pressure change value) is less than 3-5 kPa, it indicates that the waterproof performance is unqualified and there is a corresponding degree of water leakage problem, which cannot meet the IPX5 standard.
[0035] In some examples, the waterproof self-testing device 100 also includes a pressure regulating module (not shown), which is built into the internal sealed space and electrically connected to the controller to regulate the air pressure in the internal sealed space. Thus, by setting up the pressure regulating module, the waterproof self-testing device 100 can perform waterproof self-tests at any time without requiring the LED display 200 to be turned on or off. In this case, it is only necessary to adjust the air pressure in the internal sealed space by raising or lowering a preset threshold. Further, the pressure regulating module can specifically be an air pump, which is used to regulate the air pressure in the internal sealed space by pumping air in or out when the waterproof and breathable structure 130 is closed. Even further, the pressure regulating module can be a temperature regulating component, which is used to regulate the air pressure in the internal sealed space by heating or cooling it when the waterproof and breathable structure 130 is closed. The temperature regulating component can be a heater or a cooler to achieve heating or cooling.
[0036] In some examples, the waterproof self-testing device 100 also includes a leakage warning module (not shown). This module is mounted on the surface of the LED display screen 200 and electrically connected to the controller. When the controller detects a leakage problem in the internal sealed space, it alerts relevant personnel. Thus, the leakage warning module further ensures that relevant personnel are promptly informed of any leakage issues with the LED display screen 200. Furthermore, the leakage warning module can be an indicator light or an alarm. In this way, when the controller detects a leakage problem in the internal sealed space, it can promptly alert relevant personnel through flashing indicator lights or sounding an alarm.
[0037] It is understood that the water leakage warning module in this example is preferably set on the surface of the LED display screen 200, or preferably on other surfaces of the LED display screen 200 other than the display surface. For example, the water leakage warning module can be set on any side of the LED display screen 200 or on the back opposite the display surface.
[0038] In one embodiment, such as Figures 2 to 4 As shown, this application embodiment also provides an LED display screen 200, which includes a display screen body 210 and the waterproof self-testing device 100 described in the above embodiment.
[0039] It is understood that a power supply box 220 is also provided on the back of the display screen body 210 in this application embodiment, and the aforementioned waterproof self-test device 100 can be specifically installed in the internal sealed space of the power supply box 220.
[0040] Thus, the LED display screen 200 in this embodiment of the application has the same technical effect as the waterproof self-testing device 100 described in the above embodiment, which will not be repeated here.
[0041] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit it. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application.
Claims
1. A waterproof self-testing device, applied to an LED display screen, characterized in that, Includes a controller, connecting pipes, pressure sensing components, and a waterproof and breathable structure, among which, The waterproof and breathable structure is installed on the surface of the LED display screen and is used to connect the internal sealed space of the LED display screen with the external environment when it is opened; The connecting pipe is built into the internal sealed space. One end of the connecting pipe is connected to the waterproof and breathable structure, and the other end of the connecting pipe is provided with the pressure detection element. The pressure detection device is built into the internal sealed space and is used to detect the pressure change value of the internal sealed space. The controller is electrically connected to the pressure detection device and the waterproof and breathable structure, respectively, and is used to control the opening and closing of the waterproof and breathable structure, and to determine whether there is a water leakage problem in the internal sealed space based on whether the pressure change value detected by the pressure detection device reaches a preset threshold.
2. The waterproof self-testing device according to claim 1, characterized in that, The waterproof and breathable structure includes a waterproof and breathable valve and a normally open solenoid valve for controlling the opening and closing of the waterproof and breathable valve. The normally open solenoid valve is electrically connected to the controller.
3. The waterproof self-testing device according to claim 1, characterized in that, The connecting pipe is a flexible hose.
4. The waterproof self-testing device according to claim 1, characterized in that, It also includes a temperature sensor, which is built into the internal sealed space and electrically connected to the controller, for detecting the temperature change value of the internal sealed space; the controller is used to determine the sealing degree of the internal sealed space based on the pressure change value detected by the pressure detection element and the temperature change value detected by the temperature sensor.
5. The waterproof self-inspection device according to claim 1, characterized in that, It also includes a pressure regulating module, which is built into the internal sealed space and electrically connected to the controller for adjusting the air pressure of the internal sealed space.
6. The waterproof self-testing device according to claim 5, characterized in that, The pressure adjustment module is an air pump, which is used to adjust the air pressure of the internal sealed space by pumping or inflating the internal sealed space when the waterproof and breathable structure is closed.
7. The waterproof self-testing device according to claim 5, characterized in that, The pressure regulation module is a temperature regulating component, which is used to regulate the air pressure of the internal sealed space by heating or cooling the internal sealed space when the waterproof and breathable structure is closed.
8. The waterproof self-testing device according to any one of claims 1-7, characterized in that, It also includes a water leakage warning module, which is installed on the surface of the LED display screen and electrically connected to the controller. When the controller detects a water leakage problem in the internal sealed space, it will issue a water leakage warning to relevant personnel.
9. The waterproof self-testing device according to claim 8, characterized in that, The water leakage warning module is an indicator light or an alarm.
10. An LED display screen, characterized in that, It includes the display screen body and the waterproof self-testing device as described in any one of claims 1-9.