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| The life of LED lamp beads depends on the basic knowledge of _Led lamp beads |
| Time:2022-10-09 00:00:00 | view： |
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Five main factors affecting the life of LED lights If you use a light source for a long time, you will get huge economic benefits and reduce carbon footprints. According to the system design, the decrease in light flux is a normal process, but it can be ignored. When the amount of light is very slow, the system will maintain a good state without having to maintain long -term maintenance. Compared with other applications in many applications, LEDs are undoubtedly more outstanding. In order to maintain a good state of the system, the following 5 factors need to be considered. 1. Efficiency LED light and LED module manufacturing and drivers are within a specific current range. According to its characteristics, LEDs from 350mA to 500mA are available. Many systems are driven in high numerical areas of this current. 2. acidity conditions Under some acidic conditions, LEDs are also easily affected, such as coastal with high salt content, factories that use chemicals or manufacturing products, or in indoor swimming pools. Although LEDs are also made for these areas, they must be carefully packaged into a fully closed cover, and there must be a high IP protection level. 3. calories Heat will affect LED's optical flux and life cycle. The radiator can avoid overheating. The heat of the system means that the allowable environmental temperature of LED lights is exceeded. LED's life depends on the environmental temperature of the surrounding. 4. Mechanical stress When manufacturing, stacking or simple operation LED, the mechanical stress will also affect the service life of the LED light, and sometimes it will even completely destroy the LED light. Pay attention to static discharge (ESD), because this will cause a short but high -current pulse, which will damage the LED and LED drives. 5. The performance of humidity LED also depends on the humidity of the surrounding environment. Because in a humid environment, electronic equipment and metal components are often damaged quickly and start to rust. Therefore, try to avoid humidity as much as possible. How to recognize LED lamp beads?LED lamp bead LED is full name of semiconductor emitting diode, which is made of semiconductor material to directly convert electrical energy into optical energy, and the electric number is converted into a light signal luminous device; its characteristics are merits The advantages of low, high brightness, colorful color, vibration, long life (normal glowing 80,000 to 100,000 hours), cold light sources and other advantages are true \"green lighting\". In the future of the 21st century, lighting products with LED as light sources will inevitably replace white weaving lamps and become another revolution in human lighting. LED lamp bead lighting is developed due to the advantages of LED lamp beads adaptability, life, and efficiency than previous lighting forms. Therefore, it is easy to understand that LED lighting is widely used in many applications such as home lights, factory industrial lighting, marine environment lighting, architectural lighting, and design. With the booming development of LED lamp beads and solid lighting industries, LED lamp bead developers apply technology to a harsh environment. Today, we discuss the needs of protecting LED lamp beads and circuit components in harsh environments, such as marine applications. Coating and other protection technologies can extend the life and performance of the solid -state lighting system. LED lamp beads with the rapid development of the market, the correct choice is the key to ensuring performance and service life of LED lamp beads. Today, we emphasize how to use LED lamp beads in various environments and introduce how to protect appropriately in these environments. While the development process ensures reliability, it is necessary to ensure the good optical properties of the solid -state lighting system. LED lamp bead applications are becoming more and more diverse. The functional proof of design requirements, location, or product proof is constantly changing. Like most electronic devices, LED lamp beads are good until external influences begin to reduce their performance. These affect static attractions, chemical or gas pollution, and many other possibilities in the dust, humid or corrosive environment. Therefore, you need to fully consider the final use environment and choose the appropriate product. Compared with the environmental conditions in standard building lighting applications, compared with the marine environment, it helps to understand the potential causes of deterioration. In the application of building lighting, the design of the lighting unit may cover the LED lamp bead itself, or it may only be exposed to the direction of the general change of LED lamp beads that are exposed to the general changes in the environmental temperature and humidity. In the marine environment, LED lamp beads may be splattered or soaked by salt water. In addition, in all cases, the service life of LED lamp beads is mostly working in the salt and mist environment. High -salt conditions may cause corrosion printing circuit board PCB, and its performance changes faster than usual humidity. Generally speaking, in these environments, sealed resins and preservation coating can provide high -level protection. Seal resin appears in various chemical types including epoxy resin, polyurethane and silicon resin. Generally speaking, epoxy resin provides stronger protection on machinery, but other chemicals are not flexible and may cause problems in the heat circulation. In addition, standard epoxy resin systems cannot provide clarity and color stability of other systems. Silicon resin is really good, good at extreme temperature, and polyurethane resin provides good flexibility, transparency and high -level protection in harsh environments. After the three resin chemical types were exposed to 1,000 hours of ultraviolet rays, the difference between the color of the resin and the transparency of the three resin chemical types was studied, and an experiment of prominent stability was performed under the outdoor conditions of each resin. Silicon resin and polyurethane resin are significantly better than the standard epoxy resin system. The performance of various products in harsh environments can also be selected according to the user's final use conditions. For example, the effects of corrosive gas environment on acrylic -protective coating, polyurethane resin and silicon resin. By radiating 3 to a mixed gas environment, the proportion of light beams of LED lamp beads decreased. These results clearly show the importance of choosing the correct product for the environment. The surface insulation resistance in the corrosive gas environment will not deteriorate in the corrosive gas environment. However, for LED lamp beads, the gas can penetrate the LED lamp beads through thin coating LED lamp beads. Can not fully protect LED lamp beads. Silicon resin also has the same effect. However, in the experiment, although the protective layer is quite thick (2mm pairs of 50 microns), the gas can affect LED lamp beads through the resin. As a result of the more organic silicon resin and polyurethane materials, the organic silicon resin is transparent to the gas. The same thickness polyurethane resin is not, so the performance of these two chemical types is different. In this case, optical transparent polyurethane resin is the best protective material to prevent the impact of corrosive gases.Polyurethane resin is considered to be a resin suitable for protecting LED lamp beads in various environments. These can be modified to provide additional advantages, for example, the color system that covers PCB but does not exceed LED lamp beads. Such resin is used in the protection of PCB, which not only makes the surface comfortable, but also increases the light output from PCB reflection light to improve the performance of the lighting appliances. There are also special resins to spread the light of LED lamp beads. Experimental comparison shows that sealed resin can provide high -level protection in a series of environments. By selecting chemical types, or through the cooperation of specific resins, it can meet the application requirements. However, as mentioned above, the impact of the preservation coating of the membrane has a small impact on color temperature. Through the thickness of the preservation coating and sealing resin, the improvement of the protection level of the resin can achieve more coating. Resin 1? Although it can increase at a depth of more than 2mm, the depth also affects the color temperature level observed. Typical color temperature movement of polyurethane resin LED lamp beads at different thickness. Obviously, because the thickness is directly related to the degree of shift of the color temperature, it is also an important consideration when choosing an appropriate protection material. Although it knows that the color temperature will be shifted, LED lamp beads must consider the repeatability of offset. In the case of continuous offset, you can also re -consider the original LED lamp bead color temperature. Protective coating is typically a thin coating suitable for PCB for outlines, and provides good protection without significantly increased the weight or volume of the circuit board. Those thickness are usually 25? 75 microns, which can be easily used through spray or impregnation technology. LED lamp beads must have good transparency in order to protect the top, and keep it clearly in the entire service life of the product in the hope of the hope. When using it outdoors, the coating may require good UV stability. Therefore, the best type of protective coating acrylic is based on chemical materials to provide definition and color stability and excellent humidity and salt fog protection. In the salt fog test, acrylic coating provides good protection. Generally speaking, acrylic coated coatings are solvents -based products. The solvent used is a liquid carrier that makes the resin membrane accumulate on the substrate. The solvents used are volatile organic compounds (VOC). Such solvents only have LED lamp beads for a few minutes during the application stage, so it is not a long -term problem for many systems. In some cases, LED lamp beads manufacture The use of the use of VOC products and other specific chemicals has specific requirements, which are recorded in the LED lamp bead manual. Generally speaking, chemical adaptability test helps to confirm whether the solvent type protection coating is suitable for specific LED lights Beads. In addition to the effects of coating on LED lamp beads, the effect of coating on color temperature. LoD lamp beads commonly related to the related color green zone in lighting. Color temperature changes over time changes. Also known as color maintenance. It is found that even if any material is placed directly on the LED lamp bead crystal, it will interact, produce the deviation of the color temperature. Different LED lamp bead types and color temperate changes. In addition, different protective materials used will also be different. This is another field. Acrylic protection coating is better than other chemical materials and product types. warm white white The typical color temperature of LED lamp beads. In order to emphasize the possible changes in the color temperature, including different thickness and hardening mechanism to significantly change the color temperature. 25 and 75 microns. By applying this kind of film, the color temperature can be minimized, and it can be controlled within the boundary given by the LED lamp bead manufacturer. Ideally, due to the convenient application of the shelf coating, and comparing the lightning The impact of the volume and weight of the unit is small, and the effects of the multifunctional and color temperature of the use can be used in all LED lamps. Application. As mentioned above, the preservation coating provides a very good protection level in the wet and salt mog environment, but in the environment of frequent immersion in water, chemical spray and corrosive gases, the protection coating cannot provide the highest level of protection for protection . If the conditions become more difficult, it is recommended to convert it to a sealed resin. In this case, the choice between the chemical type is determined by the final use conditions and a specific environmental impact. In addition, it must be considered that the resin to add the resin to add Thickness, minimize the impact on color temperature as much as possible, and ensure sufficient protection at the same time. |
