The modern ceiling, the essence of which is the bearing body of indoor building electrical appliances and electrical installations, and has both decorative and protective functions. As the most important component of indoor electrical, the design and installation of lighting fixtures are increasingly closely integrated with the ceiling based on functional and decorative needs. The integrated ceiling, integrated belt and integrated light trough that have emerged in recent years are remarkable performances. With the advent of the ceiling trend and the rapid development of global energy-saving technology, as an important functional module of the integrated ceiling, the lighting technology of the ceiling has also ushered in the LED period.
LED popularization speed brings opportunities in the ceiling industry
According to the survey data, at present, in the emerging projects in China, LED penetration in outdoor lighting has almost reached 100%, and the penetration rate in public indoor lighting projects has exceeded 80%, and in home decoration, it has been 100%. penetration. As the integrated ceiling industry based on the home improvement market at the present stage, LED lighting and decoration technology has been fully applied, and the popularization and application of LED light sources is an indisputable fact.
In the development of integrated ceilings in the past ten years, in the application of lighting, experienced the "inkbright bulbs of Yuba" → quartz halogen spotlight module → electronic fluorescent lamp module → LED straw hat lamp bead module, to today, mainly used side-emitting LED panel lights The evolution of the main lighting and multi-functional combination modules, on the one hand, is the continuous improvement of lighting technology, and more importantly, the consumer market's cognitive progress and consumer demand for lighting lighting.
The LED panel light embodies the lighting application realm of “seeing the light without seeing the lightâ€. It has the advantages of uniform light distribution, soft and comfortable, clean and bright, and has the advantages of anti-mosquito, anti-fog and anti-fog. It has a simple shape and is easy to integrate with the ceiling module. Therefore, the integrated ceiling is especially complicated and the space is more complicated. The small kitchen sector has great application advantages. At the same time, LED panel lights have low power consumption, energy saving and environmental protection, long life, economical use; technology and fashion, application convenience and many other characteristics, deeply loved by modern consumers.
However, in the trend of rapid development of the integrated ceiling industry and the popularization of LED applications, there is no standard for LED panel lights, government technical supervision is missing, some speculators are rushing, and there is no technology in the industry. R & D, "no quality control", "no bottom limit", a table, two spiral cones, three or four people, a large number of rough production workshops. In the market, there are a lot of LED panel lights with short life span, poor light color and light leakage, and even electric leakage accidents. Users complained constantly, dealers have no door after sale, which greatly hurt the market's confidence in LED panel lights and affect the health of the industry. development of. Here, let us dissect the LED panel lamp market from the technical point of view, especially the LED panel lamp market in the integrated ceiling industry.
First, LED light source devices used in LED panel lights
Due to its small size, suitable power, high luminous efficiency, easy control of light and heat dissipation, the current LED panel lights from the earliest 3528 to the later 3014, 2835, to the current SMD4014 lamp beads.
We have thoroughly understood and sampled the LED lamp beads used in the multi-faceted “factory†of the integrated ceiling industry. Many workshops in the industry use low quality lamps with low quality and low quality. The chip is small (excellent 4014 lamp bead chip) The size is >10*30, while the low quality lamp bead chip size is below 10*18), the light output is low; at the same time, the encapsulant colloid and phosphor are low-cost configuration, and the copper wire with small melting point is used (the quality lamp bead is gold) Wire), iron bracket (quality lamp beads are made of copper bracket or synthetic material with high thermal conductivity), so that the light decay is very easy to use during the use process (it is just starting to be brighter and slowly not brighter):), Even the phenomenon of burning dead lights is frequent.
At the same time, in the integrated ceiling distribution center of a certain town in a certain city, there are special underground factories in Shenzhen and other places to collect unqualified lamp beads from various packaging manufacturers, and use inferior substrates for patching, and then like cabbage in the street Sold to local LED light assembly workshops. . These products have low light efficiency (common consumers are difficult to distinguish without contrast), poor color temperature consistency, and large color drift, and there are many problems.
Second, the status quo of the core components of the drive power
Since the LED lamp bead is a low-voltage start-up semiconductor device, the most basic requirement is to use a matched low-voltage power supply, and a constant current is required. If the current is too high, the light decays quickly. For a long time, the lamp is extremely dark or even burns. .
At present, LED driver power supply mainly has three technical solutions:
1. Resistor-capacitor: The scheme is simple, the device is small, the cost is low, and the constant current is not constant. Mainly used 3W and below LED lamp configuration, and there is a danger of leakage caused by breakdown of the lamp board, so the structural shell of the lamp body must be insulated;
2. Non-isolated power supply: The cost is moderate, IC constant current is used, but there is also the danger of leakage caused by breakdown. It is also required that the structural shell of the lamp body must be insulated. '
3. Isolated power supply: high cost, IC constant current, good security.
In order to achieve better light extraction efficiency, the LED panel lamp generally has a slender strip structure. Therefore, in order to ensure the heat dissipation of the LED lamp, the all-aluminum structure is used as a cavity and has a heat dissipation effect. For the non-insulation of the aluminum lamp body, it is necessary to use an isolated power supply to provide basic safety protection, and at the same time provide a constant and constant current to ensure the long life of the lamp bead.
At present, there is no limit in the integrated ceiling industry, which is to cut corners, use resistive voltage reduction, and also use non-isolated constant current power supply; in order to cover the market, it also uses inferior colloids, which is famous for its moisture-proof and waterproof. Fear of poor driving schemes.
At the same time, the same is the isolated constant current power supply, there are also advantages and disadvantages such as whether the solution is reasonable, the configuration is complete, the device is stable, the circuit is scientific, and the process is rigorous.
Here, only the circuit board, the poor quality drive uses the paper core board, it is easy to absorb moisture, in the process of use, it is easy to cause the line short-circuit burned; and the high-quality drive uses the glass fiber board, which has the advantages of stable line, moistureproof and durable. .
In the driving production process, the high-quality drive of the standard manufacturer adopts automatic patching and automatic wave soldering, no confusion, no virtual welding, which is unsatisfactory for the workshop process of inferior products.
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